#237C73
Closest named color: Bluegreen (#017A79). oklch(53.3% 0.083 185.2), rgb(35, 124, 115).
Aa
White text reads best on this color (4.99:1).
About this color
#237C73 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 53%, its chroma 0.083 and its hue 185°. Its hue sits on the cool side of the wheel. The nearest named color is Bluegreen (#017A79), ΔE 0.017 away. White text reads best on it, at 4.99:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.083) |
| Temperature | cool |
| Nearest name | Bluegreen (#017A79) |
| Black text | 4.20:1 |
| White text | 4.99:1 |
Values
| HEX | #237C73 |
| RGB | rgb(35, 124, 115) |
| HSL | hsl(174, 56%, 31%) |
| OKLCH | oklch(53.3% 0.083 185.2) |
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 #237C73 | 4.99:1 | AA | Lc -79.7 | Fine for body text |
| Black text on #237C73 | 4.20:1 | AA large text | Lc 29.8 | Dividers and decoration only |
| #237C73 text on white | 4.99:1 | AA | Lc 74.2 | Content text, not long reading |
| #237C73 text on black | 4.20:1 | AA large text | Lc -27.5 | 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
#F2F7F6
oklch(97.2% 0.005 183)
-
Step 100
100
#E2ECEB
oklch(93.5% 0.011 189.8)
-
Step 200
200
#CBDEDB
oklch(88.6% 0.021 185.4)
-
Step 300
300
#A7C9C4
oklch(81% 0.037 185.6)
-
Step 400
400
#75ADA5
oklch(70.6% 0.06 184.8)
-
Step 500
500
#4E9990
oklch(63.2% 0.076 185.3)
-
Step 600
600 (this color)
#237C73
oklch(53.3% 0.083 185.2)
-
Step 700
700
#1D6F67
oklch(49.2% 0.077 185.5)
-
Step 800
800
#1B5A54
oklch(42.6% 0.064 186.1)
-
Step 900
900
#1E4A45
oklch(37.7% 0.049 185.4)
-
Step 950
950
#132B28
oklch(26.8% 0.031 185.1)
#237C73 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) | #767573 | 0.089 |
| Deuteranopia (no green cones) | #696B74 | 0.084 |
| Tritanopia (no blue cones) | #007F79 | 0.013 |
| Achromatopsia (no color) | #6F6F6F | 0.083 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #237C73
#237C73
oklch(53.3% 0.083 185.2)
- #955866
#955866
oklch(53.4% 0.082 5.4)
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 #237C73, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bluegreen #017A79 ΔE 0.017
- Teal #008080 ΔE 0.020
- Deep Aqua #08787F ΔE 0.027
- Dark Aquamarine #017371 ΔE 0.032
- Deep Turquoise #017374 ΔE 0.033
- Dark Cyan #008B8B ΔE 0.049
- Ocean #017B92 ΔE 0.051
- Dark Aqua #05696B ΔE 0.062
Use #237C73 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.