#37878C
Closest named color: Dark Cyan (#008B8B). oklch(57.7% 0.077 200.9), rgb(55, 135, 140).
Aa
Black text reads best on this color (5.00:1).
About this color
#37878C is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 58%, its chroma 0.077 and its hue 201°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Cyan (#008B8B), ΔE 0.023 away. Black text reads best on it, at 5.00:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.077) |
| Temperature | cool |
| Nearest name | Dark Cyan (#008B8B) |
| Black text | 5.00:1 |
| White text | 4.19:1 |
Values
| HEX | #37878C |
| RGB | rgb(55, 135, 140) |
| HSL | hsl(184, 44%, 38%) |
| OKLCH | oklch(57.7% 0.077 200.9) |
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 #37878C | 4.19:1 | AA large text | Lc -74.2 | Content text, not long reading |
| Black text on #37878C | 5.00:1 | AA | Lc 35.4 | Non-text elements, placeholder text |
| #37878C text on white | 4.19:1 | AA large text | Lc 68.7 | Content text, not long reading |
| #37878C text on black | 5.00:1 | AA | Lc -33.0 | 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
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E3ECEC
oklch(93.6% 0.01 197)
-
Step 200
200
#CBDDDE
oklch(88.4% 0.019 200.8)
-
Step 300
300
#A7C8CA
oklch(80.9% 0.035 201)
-
Step 400
400
#77ABAF
oklch(70.6% 0.055 202)
-
Step 500
500
#50979B
oklch(63.2% 0.072 200.3)
-
Step 600
600 (this color)
#37878C
oklch(57.7% 0.077 200.9)
-
Step 700
700
#216D71
oklch(49.1% 0.072 200.2)
-
Step 800
800
#1E595C
oklch(42.8% 0.06 199.9)
-
Step 900
900
#1F494C
oklch(37.7% 0.047 201.6)
-
Step 950
950
#142B2C
oklch(27.1% 0.029 199.2)
#37878C 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) | #7E818C | 0.079 |
| Deuteranopia (no green cones) | #70778C | 0.073 |
| Tritanopia (no blue cones) | #008C88 | 0.027 |
| Achromatopsia (no color) | #7C7C7C | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37878C
#37878C
oklch(57.7% 0.077 200.9)
- #A26765
#A26765
oklch(57.7% 0.077 21.8)
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 #37878C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Cyan #008B8B ΔE 0.023
- Teal Blue #01889F ΔE 0.033
- Teal Green #0A9396 ΔE 0.035
- Teal #008080 ΔE 0.038
- Dusty Teal #4C9085 ΔE 0.038
- Ocean #017B92 ΔE 0.049
- Grey Blue #647D8E ΔE 0.052
- Cerulean #457B9D ΔE 0.052
Use #37878C 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.