#37636F
Closest named color: Slate (#516572). oklch(47.3% 0.052 217.4), rgb(55, 99, 111).
Aa
White text reads best on this color (6.61:1).
About this color
#37636F is a medium-dark, muted teal or cyan. In OKLCH its lightness is 47%, its chroma 0.052 and its hue 217°. Its hue sits on the cool side of the wheel. The nearest named color is Slate (#516572), ΔE 0.033 away. White text reads best on it, at 6.61:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (47%) |
| Chroma | muted (0.052) |
| Temperature | cool |
| Nearest name | Slate (#516572) |
| Black text | 3.17:1 |
| White text | 6.61:1 |
Values
| HEX | #37636F |
| RGB | rgb(55, 99, 111) |
| HSL | hsl(193, 34%, 33%) |
| OKLCH | oklch(47.3% 0.052 217.4) |
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 #37636F | 6.61:1 | AA | Lc -87.6 | Fine for body text |
| Black text on #37636F | 3.17:1 | AA large text | Lc 21.5 | Dividers and decoration only |
| #37636F text on white | 6.61:1 | AA | Lc 82.6 | Fine for body text |
| #37636F 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
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E5EBED
oklch(93.6% 0.007 219.6)
-
Step 200
200
#CFDCDF
oklch(88.6% 0.015 213.1)
-
Step 300
300
#AFC5CB
oklch(80.9% 0.025 215.9)
-
Step 400
400
#85A7B1
oklch(70.6% 0.04 217.6)
-
Step 500
500
#65929E
oklch(63.2% 0.052 216.2)
-
Step 600
600
#4B7C89
oklch(55.7% 0.057 216.6)
-
Step 700
700 (this color)
#37636F
oklch(47.3% 0.052 217.4)
-
Step 800
800
#32555F
oklch(42.7% 0.044 218)
-
Step 900
900
#2C464D
oklch(37.6% 0.034 216.5)
-
Step 950
950
#1A292D
oklch(26.9% 0.022 216.2)
#37636F 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) | #5B6170 | 0.046 |
| Deuteranopia (no green cones) | #525A6F | 0.041 |
| Tritanopia (no blue cones) | #196767 | 0.031 |
| Achromatopsia (no color) | #5D5D5D | 0.053 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37636F
#37636F
oklch(47.3% 0.052 217.4)
- #765146
#765146
oklch(47.2% 0.053 37.2)
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 #37636F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.033
- Dark Aqua #05696B ΔE 0.035
- YInMn Blue #415A77 ΔE 0.036
- Petrol #005F6A ΔE 0.039
- Dark Green Blue #1F6357 ΔE 0.048
- Denim #3B638C ΔE 0.049
- Deep Turquoise #017374 ΔE 0.052
- Dusty Grape #545775 ΔE 0.053
Use #37636F 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.