#309AAE
Closest named color: Sea (#3C9992). oklch(63.6% 0.097 213), rgb(48, 154, 174).
Aa
Black text reads best on this color (6.35:1).
About this color
#309AAE is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 64%, its chroma 0.097 and its hue 213°. Its hue sits on the cool side of the wheel. The nearest named color is Sea (#3C9992), ΔE 0.042 away. Black text reads best on it, at 6.35:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.097) |
| Temperature | cool |
| Nearest name | Sea (#3C9992) |
| Black text | 6.35:1 |
| White text | 3.30:1 |
Values
| HEX | #309AAE |
| RGB | rgb(48, 154, 174) |
| HSL | hsl(190, 57%, 44%) |
| OKLCH | oklch(63.6% 0.097 213) |
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 #309AAE | 3.30:1 | AA large text | Lc -65.5 | Content text, not long reading |
| Black text on #309AAE | 6.35:1 | AA | Lc 44.0 | Non-text elements, placeholder text |
| #309AAE text on white | 3.30:1 | AA large text | Lc 60.1 | Content text, not long reading |
| #309AAE text on black | 6.35:1 | AA | Lc -41.7 | 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
#F1F7F8
oklch(97.2% 0.007 208.8)
-
Step 100
100
#E0ECEF
oklch(93.5% 0.013 214.4)
-
Step 200
200
#C6DEE4
oklch(88.5% 0.027 214.4)
-
Step 300
300
#9EC9D3
oklch(80.8% 0.047 213.5)
-
Step 400
400
#64ADBD
oklch(70.6% 0.077 213.4)
-
Step 500
500 (this color)
#309AAE
oklch(63.6% 0.097 213)
-
Step 600
600
#008295
oklch(55.7% 0.097 212.5)
-
Step 700
700
#006D7E
oklch(49.1% 0.086 213.3)
-
Step 800
800
#005967
oklch(42.6% 0.075 213)
-
Step 900
900
#064A56
oklch(37.7% 0.064 213.7)
-
Step 950
950
#092B32
oklch(26.9% 0.04 214.1)
#309AAE 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) | #8B95AF | 0.089 |
| Deuteranopia (no green cones) | #7988AE | 0.080 |
| Tritanopia (no blue cones) | #00A2A0 | 0.039 |
| Achromatopsia (no color) | #8D8D8D | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #309AAE
#309AAE
oklch(63.6% 0.097 213)
- #BE7464
#BE7464
oklch(63.5% 0.097 33)
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 #309AAE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea #3C9992 ΔE 0.042
- Teal Green #0A9396 ΔE 0.043
- Cadet Blue #5F9EA0 ΔE 0.044
- Persian Green #2A9D8F ΔE 0.052
- Blue NCS #118AB2 ΔE 0.053
- Blue Green #0F9B8E ΔE 0.054
- Teal Blue #01889F ΔE 0.059
- Dusty Teal #4C9085 ΔE 0.060
Use #309AAE 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.