#37656B
Closest named color: Dark Aqua (#05696B). oklch(47.6% 0.051 206.4), rgb(55, 101, 107).
Aa
White text reads best on this color (6.48:1).
About this color
#37656B is a medium-dark, muted teal or cyan. In OKLCH its lightness is 48%, its chroma 0.051 and its hue 206°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Aqua (#05696B), ΔE 0.030 away. White text reads best on it, at 6.48:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (48%) |
| Chroma | muted (0.051) |
| Temperature | cool |
| Nearest name | Dark Aqua (#05696B) |
| Black text | 3.23:1 |
| White text | 6.48:1 |
Values
| HEX | #37656B |
| RGB | rgb(55, 101, 107) |
| HSL | hsl(187, 32%, 32%) |
| OKLCH | oklch(47.6% 0.051 206.4) |
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 #37656B | 6.48:1 | AA | Lc -87.2 | Fine for body text |
| Black text on #37656B | 3.23:1 | AA large text | Lc 22.0 | Dividers and decoration only |
| #37656B text on white | 6.48:1 | AA | Lc 82.1 | Fine for body text |
| #37656B text on black | 3.23:1 | AA large text | Lc -19.8 | 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 700.
-
Step 50
50
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E5EBEC
oklch(93.6% 0.007 208.8)
-
Step 200
200
#CFDCDE
oklch(88.5% 0.014 207.9)
-
Step 300
300
#AFC6C9
oklch(81% 0.025 206.2)
-
Step 400
400
#84A8AD
oklch(70.7% 0.04 206.8)
-
Step 500
500
#649399
oklch(63.2% 0.051 206)
-
Step 600
600
#4A7D83
oklch(55.6% 0.056 205.3)
-
Step 700
700 (this color)
#37656B
oklch(47.6% 0.051 206.4)
-
Step 800
800
#31565B
oklch(42.8% 0.043 206.7)
-
Step 900
900
#2C474A
oklch(37.8% 0.033 204.7)
-
Step 950
950
#1A292C
oklch(26.9% 0.021 211.4)
#37656B 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) | #5E626B | 0.050 |
| Deuteranopia (no green cones) | #565B6B | 0.047 |
| Tritanopia (no blue cones) | #1C6867 | 0.024 |
| Achromatopsia (no color) | #5E5E5E | 0.052 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37656B
#37656B
oklch(47.6% 0.051 206.4)
- #77524D
#77524D
oklch(47.7% 0.051 27.7)
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 #37656B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Aqua #05696B ΔE 0.030
- Slate #516572 ΔE 0.034
- Petrol #005F6A ΔE 0.041
- Dark Green Blue #1F6357 ΔE 0.041
- Deep Turquoise #017374 ΔE 0.045
- YInMn Blue #415A77 ΔE 0.046
- Dark Aquamarine #017371 ΔE 0.046
- Denim #3B638C ΔE 0.057
Use #37656B 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.