#37858E
Closest named color: Dark Cyan (#008B8B). oklch(57.2% 0.077 205.7), rgb(55, 133, 142).
Aa
Black text reads best on this color (4.90:1).
About this color
#37858E is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 57%, its chroma 0.077 and its hue 206°. 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 4.90:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.077) |
| Temperature | cool |
| Nearest name | Dark Cyan (#008B8B) |
| Black text | 4.90:1 |
| White text | 4.27:1 |
Values
| HEX | #37858E |
| RGB | rgb(55, 133, 142) |
| HSL | hsl(186, 44%, 39%) |
| OKLCH | oklch(57.2% 0.077 205.7) |
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 #37858E | 4.27:1 | AA large text | Lc -74.9 | Content text, not long reading |
| Black text on #37858E | 4.90:1 | AA | Lc 34.7 | Non-text elements, placeholder text |
| #37858E text on white | 4.27:1 | AA large text | Lc 69.4 | Content text, not long reading |
| #37858E text on black | 4.90:1 | 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
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E3ECED
oklch(93.7% 0.01 204.9)
-
Step 200
200
#CBDDDF
oklch(88.5% 0.019 204.8)
-
Step 300
300
#A8C7CB
oklch(80.8% 0.034 206)
-
Step 400
400
#77ABB1
oklch(70.7% 0.055 205)
-
Step 500
500
#51969E
oklch(63.1% 0.071 205.3)
-
Step 600
600 (this color)
#37858E
oklch(57.2% 0.077 205.7)
-
Step 700
700
#236C74
oklch(49% 0.071 205.5)
-
Step 800
800
#1F585F
oklch(42.6% 0.059 206.5)
-
Step 900
900
#20494D
oklch(37.8% 0.046 203.9)
-
Step 950
950
#142B2D
oklch(27.1% 0.029 202.9)
#37858E 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) | #7B808F | 0.076 |
| Deuteranopia (no green cones) | #6D768E | 0.069 |
| Tritanopia (no blue cones) | #008A88 | 0.029 |
| Achromatopsia (no color) | #7A7A7A | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37858E
#37858E
oklch(57.2% 0.077 205.7)
- #A16660
#A16660
oklch(57.3% 0.077 26.1)
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 #37858E, 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 Blue #01889F ΔE 0.030
- Teal #008080 ΔE 0.037
- Teal Green #0A9396 ΔE 0.041
- Ocean #017B92 ΔE 0.043
- Cerulean #457B9D ΔE 0.045
- Dusty Teal #4C9085 ΔE 0.045
- Stormy Blue #507B9C ΔE 0.047
Use #37858E 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.