#237F66
Closest named color: Bluegreen (#017A79). oklch(53.7% 0.093 170.6), rgb(35, 127, 102).
Aa
White text reads best on this color (4.88:1).
About this color
#237F66 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 54%, its chroma 0.093 and its hue 171°. Its hue sits on the cool side of the wheel. The nearest named color is Bluegreen (#017A79), ΔE 0.039 away. White text reads best on it, at 4.88:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.093) |
| Temperature | cool |
| Nearest name | Bluegreen (#017A79) |
| Black text | 4.29:1 |
| White text | 4.88:1 |
Values
| HEX | #237F66 |
| RGB | rgb(35, 127, 102) |
| HSL | hsl(164, 57%, 32%) |
| OKLCH | oklch(53.7% 0.093 170.6) |
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 #237F66 | 4.88:1 | AA | Lc -78.9 | Fine for body text |
| Black text on #237F66 | 4.29:1 | AA large text | Lc 30.6 | Non-text elements, placeholder text |
| #237F66 text on white | 4.88:1 | AA | Lc 73.5 | Content text, not long reading |
| #237F66 text on black | 4.29:1 | AA large text | Lc -28.2 | 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
#F2F7F5
oklch(97.2% 0.006 170.4)
-
Step 100
100
#E2EDE9
oklch(93.7% 0.013 172.4)
-
Step 200
200
#CBDED7
oklch(88.4% 0.022 171.7)
-
Step 300
300
#A6CABD
oklch(80.9% 0.043 171.3)
-
Step 400
400
#75AF9B
oklch(70.8% 0.068 170.7)
-
Step 500
500
#4D9A82
oklch(63% 0.085 170.8)
-
Step 600
600 (this color)
#237F66
oklch(53.7% 0.093 170.6)
-
Step 700
700
#1B705A
oklch(49% 0.086 171.3)
-
Step 800
800
#1A5C49
oklch(42.8% 0.073 170)
-
Step 900
900
#1D4B3D
oklch(37.6% 0.056 170.5)
-
Step 950
950
#122C24
oklch(27% 0.036 171.2)
#237F66 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) | #7B7665 | 0.096 |
| Deuteranopia (no green cones) | #6F6D68 | 0.093 |
| Tritanopia (no blue cones) | #008078 | 0.027 |
| Achromatopsia (no color) | #717171 | 0.094 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #237F66
#237F66
oklch(53.7% 0.093 170.6)
- #965675
#965675
oklch(53.7% 0.093 350.3)
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 #237F66, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bluegreen #017A79 ΔE 0.039
- Teal #008080 ΔE 0.039
- Dark Aquamarine #017371 ΔE 0.049
- Sea Green #2E8B57 ΔE 0.050
- Deep Aqua #08787F ΔE 0.051
- Deep Turquoise #017374 ΔE 0.052
- Viridian #1E9167 ΔE 0.056
- Dark Sage #598556 ΔE 0.056
Use #237F66 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.