#237A81
Closest named color: Deep Aqua (#08787F). oklch(53.3% 0.08 202.9), rgb(35, 122, 129).
Aa
White text reads best on this color (5.03:1).
About this color
#237A81 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 53%, its chroma 0.080 and its hue 203°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Aqua (#08787F), ΔE 0.013 away. White text reads best on it, at 5.03:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.080) |
| Temperature | cool |
| Nearest name | Deep Aqua (#08787F) |
| Black text | 4.17:1 |
| White text | 5.03:1 |
Values
| HEX | #237A81 |
| RGB | rgb(35, 122, 129) |
| HSL | hsl(184, 57%, 32%) |
| OKLCH | oklch(53.3% 0.08 202.9) |
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 #237A81 | 5.03:1 | AA | Lc -79.9 | Fine for body text |
| Black text on #237A81 | 4.17:1 | AA large text | Lc 29.6 | Dividers and decoration only |
| #237A81 text on white | 5.03:1 | AA | Lc 74.5 | Content text, not long reading |
| #237A81 text on black | 4.17:1 | AA large text | Lc -27.2 | Dividers and decoration only |
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 600.
-
Step 50
50
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E2ECED
oklch(93.6% 0.011 204.1)
-
Step 200
200
#CBDDDF
oklch(88.5% 0.019 204.8)
-
Step 300
300
#A6C8CB
oklch(80.9% 0.037 203)
-
Step 400
400
#75ACB0
oklch(70.8% 0.058 201.7)
-
Step 500
500
#4E979D
oklch(63.2% 0.073 202.5)
-
Step 600
600 (this color)
#237A81
oklch(53.3% 0.08 202.9)
-
Step 700
700
#1D6D73
oklch(49.1% 0.074 202.4)
-
Step 800
800
#1B595E
oklch(42.7% 0.062 202.8)
-
Step 900
900
#1E494D
oklch(37.7% 0.048 203.6)
-
Step 950
950
#132B2D
oklch(27.1% 0.03 202.6)
#237A81 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) | #707582 | 0.080 |
| Deuteranopia (no green cones) | #636B81 | 0.074 |
| Tritanopia (no blue cones) | #007F7C | 0.022 |
| Achromatopsia (no color) | #6F6F6F | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #237A81
#237A81
oklch(53.3% 0.08 202.9)
- #965957
#965957
oklch(53.3% 0.081 22.2)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #237A81, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Aqua #08787F ΔE 0.013
- Bluegreen #017A79 ΔE 0.018
- Teal #008080 ΔE 0.021
- Ocean #017B92 ΔE 0.027
- Deep Turquoise #017374 ΔE 0.031
- Dark Aquamarine #017371 ΔE 0.034
- Sea Blue #047495 ΔE 0.043
- Dark Cyan #008B8B ΔE 0.049
Use #237A81 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.