#37655A
Closest named color: Dark Green Blue (#1F6357). oklch(47% 0.054 176.6), rgb(55, 101, 90).
Aa
White text reads best on this color (6.62:1).
About this color
#37655A is a medium-dark, muted teal or cyan. In OKLCH its lightness is 47%, its chroma 0.054 and its hue 177°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Green Blue (#1F6357), ΔE 0.023 away. White text reads best on it, at 6.62:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (47%) |
| Chroma | muted (0.054) |
| Temperature | cool |
| Nearest name | Dark Green Blue (#1F6357) |
| Black text | 3.17:1 |
| White text | 6.62:1 |
Values
| HEX | #37655A |
| RGB | rgb(55, 101, 90) |
| HSL | hsl(166, 29%, 31%) |
| OKLCH | oklch(47% 0.054 176.6) |
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 #37655A | 6.62:1 | AA | Lc -87.7 | Fine for body text |
| Black text on #37655A | 3.17:1 | AA large text | Lc 21.4 | Dividers and decoration only |
| #37655A text on white | 6.62:1 | AA | Lc 82.6 | Fine for body text |
| #37655A text on black | 3.17:1 | AA large text | Lc -19.3 | 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
#F3F6F5
oklch(97.1% 0.003 174.5)
-
Step 100
100
#E5ECEA
oklch(93.7% 0.008 177.3)
-
Step 200
200
#D0DCD9
oklch(88.5% 0.014 179.4)
-
Step 300
300
#B0C6C0
oklch(80.8% 0.025 177.5)
-
Step 400
400
#85AAA0
oklch(70.8% 0.043 176.7)
-
Step 500
500
#669489
oklch(63% 0.053 177.9)
-
Step 600
600
#4C7F72
oklch(55.6% 0.059 176)
-
Step 700
700 (this color)
#37655A
oklch(47% 0.054 176.6)
-
Step 800
800
#33574E
oklch(42.7% 0.044 176.4)
-
Step 900
900
#2D4841
oklch(37.8% 0.035 176.2)
-
Step 950
950
#1B2A26
oklch(27% 0.022 176.2)
#37655A 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) | #62605A | 0.057 |
| Deuteranopia (no green cones) | #5A5A5B | 0.055 |
| Tritanopia (no blue cones) | #266662 | 0.017 |
| Achromatopsia (no color) | #5D5D5D | 0.055 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37655A
#37655A
oklch(47% 0.054 176.6)
- #744E5B
#744E5B
oklch(47% 0.054 357.2)
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 #37655A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Green Blue #1F6357 ΔE 0.023
- Dark Aqua #05696B ΔE 0.034
- Dark Aquamarine #017371 ΔE 0.049
- Petrol #005F6A ΔE 0.049
- Deep Turquoise #017374 ΔE 0.051
- Slate #516572 ΔE 0.053
- Pine #2B5D34 ΔE 0.060
- Spruce #0A5F38 ΔE 0.066
Use #37655A 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.