#237B6D
Closest named color: Bluegreen (#017A79). oklch(52.8% 0.084 180), rgb(35, 123, 109).
Aa
White text reads best on this color (5.09:1).
About this color
#237B6D is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 53%, its chroma 0.084 and its hue 180°. Its hue sits on the cool side of the wheel. The nearest named color is Bluegreen (#017A79), ΔE 0.022 away. White text reads best on it, at 5.09:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.084) |
| Temperature | cool |
| Nearest name | Bluegreen (#017A79) |
| Black text | 4.12:1 |
| White text | 5.09:1 |
Values
| HEX | #237B6D |
| RGB | rgb(35, 123, 109) |
| HSL | hsl(170, 56%, 31%) |
| OKLCH | oklch(52.8% 0.084 180) |
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 #237B6D | 5.09:1 | AA | Lc -80.2 | Fine for body text |
| Black text on #237B6D | 4.12:1 | AA large text | Lc 29.3 | Dividers and decoration only |
| #237B6D text on white | 5.09:1 | AA | Lc 74.8 | Content text, not long reading |
| #237B6D text on black | 4.12:1 | AA large text | Lc -26.9 | 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
#F2F7F5
oklch(97.2% 0.006 170.4)
-
Step 100
100
#E2ECEA
oklch(93.5% 0.011 182.9)
-
Step 200
200
#CBDED9
oklch(88.5% 0.021 178.3)
-
Step 300
300
#A7C9C1
oklch(80.9% 0.038 179.4)
-
Step 400
400
#76ADA2
oklch(70.6% 0.06 180.6)
-
Step 500
500
#4F998B
oklch(63.1% 0.078 179.8)
-
Step 600
600 (this color)
#237B6D
oklch(52.8% 0.084 180)
-
Step 700
700
#1F6F62
oklch(49.1% 0.078 179.7)
-
Step 800
800
#1D5B50
oklch(42.8% 0.065 179.1)
-
Step 900
900
#1F4A43
oklch(37.6% 0.049 181.4)
-
Step 950
950
#132C27
oklch(27.1% 0.033 179.2)
#237B6D 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) | #76736C | 0.090 |
| Deuteranopia (no green cones) | #696A6E | 0.085 |
| Tritanopia (no blue cones) | #007D77 | 0.016 |
| Achromatopsia (no color) | #6E6E6E | 0.085 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #237B6D
#237B6D
oklch(52.8% 0.084 180)
- #935669
#935669
oklch(52.9% 0.084 0.3)
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 #237B6D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bluegreen #017A79 ΔE 0.022
- Teal #008080 ΔE 0.029
- Dark Aquamarine #017371 ΔE 0.032
- Deep Aqua #08787F ΔE 0.034
- Deep Turquoise #017374 ΔE 0.034
- Dark Cyan #008B8B ΔE 0.056
- Ocean #017B92 ΔE 0.059
- Dark Aqua #05696B ΔE 0.060
Use #237B6D 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.