#37858B
Closest named color: Dark Cyan (#008B8B). oklch(57.1% 0.076 202.2), rgb(55, 133, 139).
Aa
Black text reads best on this color (4.89:1).
About this color
#37858B is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 57%, its chroma 0.076 and its hue 202°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Cyan (#008B8B), ΔE 0.026 away. Black text reads best on it, at 4.89:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.076) |
| Temperature | cool |
| Nearest name | Dark Cyan (#008B8B) |
| Black text | 4.89:1 |
| White text | 4.29:1 |
Values
| HEX | #37858B |
| RGB | rgb(55, 133, 139) |
| HSL | hsl(184, 43%, 38%) |
| OKLCH | oklch(57.1% 0.076 202.2) |
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 #37858B | 4.29:1 | AA large text | Lc -75.0 | Content text, not long reading |
| Black text on #37858B | 4.89:1 | AA | Lc 34.6 | Non-text elements, placeholder text |
| #37858B text on white | 4.29:1 | AA large text | Lc 69.5 | Content text, not long reading |
| #37858B text on black | 4.89:1 | AA | Lc -32.2 | 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
#E3ECED
oklch(93.7% 0.01 204.9)
-
Step 200
200
#CBDDDE
oklch(88.4% 0.019 200.8)
-
Step 300
300
#A8C8CA
oklch(81% 0.034 201.2)
-
Step 400
400
#78ABAF
oklch(70.7% 0.054 202.2)
-
Step 500
500
#52969C
oklch(63.1% 0.07 203)
-
Step 600
600 (this color)
#37858B
oklch(57.1% 0.076 202.2)
-
Step 700
700
#236C72
oklch(49% 0.071 202.9)
-
Step 800
800
#20585D
oklch(42.6% 0.058 203.4)
-
Step 900
900
#20494C
oklch(37.7% 0.046 201.8)
-
Step 950
950
#142B2C
oklch(27.1% 0.029 199.2)
#37858B 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) | #7C808B | 0.077 |
| Deuteranopia (no green cones) | #6E768B | 0.070 |
| Tritanopia (no blue cones) | #008A87 | 0.027 |
| Achromatopsia (no color) | #7A7A7A | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37858B
#37858B
oklch(57.1% 0.076 202.2)
- #A06563
#A06563
oklch(57% 0.077 21.9)
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 #37858B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Cyan #008B8B ΔE 0.026
- Teal Blue #01889F ΔE 0.033
- Teal #008080 ΔE 0.034
- Teal Green #0A9396 ΔE 0.041
- Dusty Teal #4C9085 ΔE 0.043
- Ocean #017B92 ΔE 0.045
- Cerulean #457B9D ΔE 0.049
- Bluegreen #017A79 ΔE 0.050
Use #37858B 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.