#309DC8
Closest named color: Faded Blue (#658CBB). oklch(65.4% 0.114 229.2), rgb(48, 157, 200).
Aa
Black text reads best on this color (6.78:1).
About this color
#309DC8 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 65%, its chroma 0.114 and its hue 229°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.057 away. Black text reads best on it, at 6.78:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.114) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.78:1 |
| White text | 3.09:1 |
Values
| HEX | #309DC8 |
| RGB | rgb(48, 157, 200) |
| HSL | hsl(197, 61%, 49%) |
| OKLCH | oklch(65.4% 0.114 229.2) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #309DC8 | 3.09:1 | AA large text | Lc -62.9 | Content text, not long reading |
| Black text on #309DC8 | 6.78:1 | AA | Lc 46.5 | Large or bold text, headings |
| #309DC8 text on white | 3.09:1 | AA large text | Lc 57.5 | Large or bold text, headings |
| #309DC8 text on black | 6.78:1 | AA | Lc -44.2 | Non-text elements, placeholder text |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 500.
-
Step 50
50
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#DFECF3
oklch(93.5% 0.017 230.9)
-
Step 200
200
#C5DEEA
oklch(88.6% 0.031 228.2)
-
Step 300
300
#9CC8DE
oklch(80.9% 0.056 229.9)
-
Step 400
400
#61ABCD
oklch(70.6% 0.089 229.6)
-
Step 500
500 (this color)
#309DC8
oklch(65.4% 0.114 229.2)
-
Step 600
600
#007EA6
oklch(55.5% 0.11 229.3)
-
Step 700
700
#006A8C
oklch(49% 0.097 229.1)
-
Step 800
800
#005774
oklch(42.7% 0.085 229.4)
-
Step 900
900
#004861
oklch(37.6% 0.075 229.8)
-
Step 950
950
#072B39
oklch(27.2% 0.047 228.6)
#309DC8 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #879BCA | 0.081 |
| Deuteranopia (no green cones) | #728CC7 | 0.069 |
| Tritanopia (no blue cones) | #00A9AB | 0.066 |
| Achromatopsia (no color) | #929292 | 0.114 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #309DC8
#309DC8
oklch(65.4% 0.114 229.2)
- #C87A4E
#C87A4E
oklch(65.4% 0.114 49.2)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes and gradients that use #309DC8
These curated palettes and gradients contain exactly #309DC8. Open one to see the full color scheme around it.
Palettes
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.057
- Turquoise Blue #06B1C4 ΔE 0.059
- Blue NCS #118AB2 ΔE 0.062
- Dark Sky Blue #448EE4 ΔE 0.067
- Cadet Blue #5F9EA0 ΔE 0.067
- Greyblue #77A1B5 ΔE 0.068
- Cool Blue #4984B8 ΔE 0.068
- Water Blue #0E87CC ΔE 0.069
Use #309DC8 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.