#237D91
Closest named color: Ocean (#017B92). oklch(54.7% 0.086 216.2), rgb(35, 125, 145).
Aa
White text reads best on this color (4.75:1).
About this color
#237D91 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 55%, its chroma 0.086 and its hue 216°. Its hue sits on the cool side of the wheel. The nearest named color is Ocean (#017B92), ΔE 0.013 away. White text reads best on it, at 4.75:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.086) |
| Temperature | cool |
| Nearest name | Ocean (#017B92) |
| Black text | 4.41:1 |
| White text | 4.75:1 |
Values
| HEX | #237D91 |
| RGB | rgb(35, 125, 145) |
| HSL | hsl(191, 61%, 35%) |
| OKLCH | oklch(54.7% 0.086 216.2) |
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 #237D91 | 4.75:1 | AA | Lc -78.1 | Fine for body text |
| Black text on #237D91 | 4.41:1 | AA large text | Lc 31.4 | Non-text elements, placeholder text |
| #237D91 text on white | 4.75:1 | AA | Lc 72.7 | Content text, not long reading |
| #237D91 text on black | 4.41:1 | AA large text | Lc -29.0 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E2ECEF
oklch(93.6% 0.011 217.5)
-
Step 200
200
#CADDE2
oklch(88.5% 0.022 215.3)
-
Step 300
300
#A5C7D1
oklch(80.8% 0.039 217.5)
-
Step 400
400
#73ABBA
oklch(70.8% 0.062 216.4)
-
Step 500
500
#4A96A8
oklch(63.2% 0.08 215.3)
-
Step 600
600 (this color)
#237D91
oklch(54.7% 0.086 216.2)
-
Step 700
700
#176C7E
oklch(49.2% 0.081 216)
-
Step 800
800
#175866
oklch(42.7% 0.067 215.5)
-
Step 900
900
#1C4853
oklch(37.6% 0.051 216.8)
-
Step 950
950
#122A31
oklch(26.9% 0.033 219.1)
#237D91 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) | #6F7992 | 0.075 |
| Deuteranopia (no green cones) | #606E91 | 0.068 |
| Tritanopia (no blue cones) | #008483 | 0.037 |
| Achromatopsia (no color) | #737373 | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #237D91
#237D91
oklch(54.7% 0.086 216.2)
- #9C5E4D
#9C5E4D
oklch(54.7% 0.086 36.1)
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 #237D91, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ocean #017B92 ΔE 0.013
- Deep Aqua #08787F ΔE 0.033
- Sea Blue #047495 ΔE 0.033
- Teal Blue #01889F ΔE 0.034
- Teal #008080 ΔE 0.034
- Cerulean #457B9D ΔE 0.035
- Bluegreen #017A79 ΔE 0.041
- Metallic Blue #4F738E ΔE 0.042
Use #237D91 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.