#37877B
Closest named color: Dark Cyan (#008B8B). oklch(57.1% 0.08 182), rgb(55, 135, 123).
Aa
Black text reads best on this color (4.91:1).
About this color
#37877B is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 57%, its chroma 0.080 and its hue 182°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Cyan (#008B8B), ΔE 0.028 away. Black text reads best on it, at 4.91:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.080) |
| Temperature | cool |
| Nearest name | Dark Cyan (#008B8B) |
| Black text | 4.91:1 |
| White text | 4.27:1 |
Values
| HEX | #37877B |
| RGB | rgb(55, 135, 123) |
| HSL | hsl(171, 42%, 37%) |
| OKLCH | oklch(57.1% 0.08 182) |
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 #37877B | 4.27:1 | AA large text | Lc -74.8 | Content text, not long reading |
| Black text on #37877B | 4.91:1 | AA | Lc 34.8 | Non-text elements, placeholder text |
| #37877B text on white | 4.27:1 | AA large text | Lc 69.3 | Content text, not long reading |
| #37877B text on black | 4.91:1 | AA | Lc -32.3 | Non-text elements, placeholder text |
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
#F2F6F6
oklch(97% 0.004 197.1)
-
Step 100
100
#E3ECEA
oklch(93.6% 0.01 181.4)
-
Step 200
200
#CCDEDA
oklch(88.6% 0.02 181.1)
-
Step 300
300
#A8C9C2
oklch(81% 0.037 181.1)
-
Step 400
400
#78ADA3
oklch(70.8% 0.058 181.5)
-
Step 500
500
#52988D
oklch(63.1% 0.073 182.6)
-
Step 600
600 (this color)
#37877B
oklch(57.1% 0.08 182)
-
Step 700
700
#236E64
oklch(49% 0.074 182.7)
-
Step 800
800
#205A51
oklch(42.7% 0.062 181.3)
-
Step 900
900
#204A43
oklch(37.7% 0.049 181.2)
-
Step 950
950
#142B27
oklch(26.9% 0.03 181.4)
#37877B 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) | #81807B | 0.085 |
| Deuteranopia (no green cones) | #75777C | 0.080 |
| Tritanopia (no blue cones) | #008983 | 0.022 |
| Achromatopsia (no color) | #7A7A7A | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37877B
#37877B
oklch(57.1% 0.08 182)
- #9F6374
#9F6374
oklch(57% 0.08 1.6)
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 #37877B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Cyan #008B8B ΔE 0.028
- Teal #008080 ΔE 0.036
- Dusty Teal #4C9085 ΔE 0.036
- Teal Green #0A9396 ΔE 0.045
- Bluegreen #017A79 ΔE 0.050
- Viridian #1E9167 ΔE 0.052
- Slate Green #658D6D ΔE 0.054
- Dark Sage #598556 ΔE 0.056
Use #37877B 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.