#237B88
Closest named color: Ocean (#017B92). oklch(53.8% 0.082 209.4), rgb(35, 123, 136).
Aa
White text reads best on this color (4.92:1).
About this color
#237B88 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 54%, its chroma 0.082 and its hue 209°. Its hue sits on the cool side of the wheel. The nearest named color is Ocean (#017B92), ΔE 0.018 away. White text reads best on it, at 4.92:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.082) |
| Temperature | cool |
| Nearest name | Ocean (#017B92) |
| Black text | 4.26:1 |
| White text | 4.92:1 |
Values
| HEX | #237B88 |
| RGB | rgb(35, 123, 136) |
| HSL | hsl(188, 59%, 34%) |
| OKLCH | oklch(53.8% 0.082 209.4) |
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 #237B88 | 4.92:1 | AA | Lc -79.2 | Fine for body text |
| Black text on #237B88 | 4.26:1 | AA large text | Lc 30.3 | Non-text elements, placeholder text |
| #237B88 text on white | 4.92:1 | AA | Lc 73.8 | Content text, not long reading |
| #237B88 text on black | 4.26:1 | AA large text | Lc -27.9 | 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
#E2ECEE
oklch(93.6% 0.011 211)
-
Step 200
200
#CADDE0
oklch(88.4% 0.021 208.1)
-
Step 300
300
#A6C8CE
oklch(81% 0.037 209.5)
-
Step 400
400
#74ABB5
oklch(70.7% 0.059 210.1)
-
Step 500
500
#4C96A2
oklch(63% 0.076 209.2)
-
Step 600
600 (this color)
#237B88
oklch(53.8% 0.082 209.4)
-
Step 700
700
#1B6C78
oklch(49% 0.076 209.6)
-
Step 800
800
#1A5862
oklch(42.6% 0.063 210.3)
-
Step 900
900
#1D4950
oklch(37.8% 0.049 209.3)
-
Step 950
950
#122B2F
oklch(27.1% 0.032 209)
#237B88 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) | #707689 | 0.079 |
| Deuteranopia (no green cones) | #616C88 | 0.070 |
| Tritanopia (no blue cones) | #00817F | 0.029 |
| Achromatopsia (no color) | #707070 | 0.082 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #237B88
#237B88
oklch(53.8% 0.082 209.4)
- #985B52
#985B52
oklch(53.8% 0.082 29.1)
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 #237B88, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ocean #017B92 ΔE 0.018
- Deep Aqua #08787F ΔE 0.020
- Teal #008080 ΔE 0.025
- Bluegreen #017A79 ΔE 0.028
- Sea Blue #047495 ΔE 0.036
- Deep Turquoise #017374 ΔE 0.040
- Dark Aquamarine #017371 ΔE 0.044
- Teal Blue #01889F ΔE 0.045
Use #237B88 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.