#309CC5
Closest named color: Faded Blue (#658CBB). oklch(65.1% 0.112 228.2), rgb(48, 156, 197).
Aa
Black text reads best on this color (6.68:1).
About this color
#309CC5 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 65%, its chroma 0.112 and its hue 228°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.055 away. Black text reads best on it, at 6.68:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.112) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.68:1 |
| White text | 3.14:1 |
Values
| HEX | #309CC5 |
| RGB | rgb(48, 156, 197) |
| HSL | hsl(197, 61%, 48%) |
| OKLCH | oklch(65.1% 0.112 228.2) |
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 #309CC5 | 3.14:1 | AA large text | Lc -63.5 | Content text, not long reading |
| Black text on #309CC5 | 6.68:1 | AA | Lc 46.0 | Large or bold text, headings |
| #309CC5 text on white | 3.14:1 | AA large text | Lc 58.1 | Large or bold text, headings |
| #309CC5 text on black | 6.68:1 | AA | Lc -43.6 | 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
#E0ECF2
oklch(93.6% 0.015 229)
-
Step 200
200
#C5DEE9
oklch(88.6% 0.031 226.1)
-
Step 300
300
#9CC8DD
oklch(80.8% 0.055 228.7)
-
Step 400
400
#61ABCC
oklch(70.6% 0.088 228.8)
-
Step 500
500 (this color)
#309CC5
oklch(65.1% 0.112 228.2)
-
Step 600
600
#007FA5
oklch(55.7% 0.108 227.8)
-
Step 700
700
#006A8B
oklch(49% 0.096 228.3)
-
Step 800
800
#005773
oklch(42.7% 0.084 228.5)
-
Step 900
900
#014860
oklch(37.6% 0.073 228.9)
-
Step 950
950
#072B38
oklch(27.1% 0.046 226.7)
#309CC5 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) | #8699C7 | 0.080 |
| Deuteranopia (no green cones) | #728BC4 | 0.069 |
| Tritanopia (no blue cones) | #00A8AA | 0.063 |
| Achromatopsia (no color) | #919191 | 0.112 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #309CC5
#309CC5
oklch(65.1% 0.112 228.2)
- #C67950
#C67950
oklch(65% 0.112 48.1)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #309CC5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.055
- Blue NCS #118AB2 ΔE 0.058
- Turquoise Blue #06B1C4 ΔE 0.061
- Cadet Blue #5F9EA0 ΔE 0.065
- Dusty Blue #5A86AD ΔE 0.065
- Cool Blue #4984B8 ΔE 0.066
- Water Blue #0E87CC ΔE 0.067
- Greyblue #77A1B5 ΔE 0.068
Use #309CC5 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.