#37646E
Closest named color: Slate (#516572). oklch(47.5% 0.052 213.7), rgb(55, 100, 110).
Aa
White text reads best on this color (6.54:1).
About this color
#37646E is a medium-dark, muted teal or cyan. In OKLCH its lightness is 48%, its chroma 0.052 and its hue 214°. 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 6.54:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (48%) |
| Chroma | muted (0.052) |
| Temperature | cool |
| Nearest name | Slate (#516572) |
| Black text | 3.21:1 |
| White text | 6.54:1 |
Values
| HEX | #37646E |
| RGB | rgb(55, 100, 110) |
| HSL | hsl(191, 33%, 32%) |
| OKLCH | oklch(47.5% 0.052 213.7) |
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 #37646E | 6.54:1 | AA | Lc -87.4 | Fine for body text |
| Black text on #37646E | 3.21:1 | AA large text | Lc 21.7 | Dividers and decoration only |
| #37646E text on white | 6.54:1 | AA | Lc 82.3 | Fine for body text |
| #37646E text on black | 3.21:1 | AA large text | Lc -19.6 | 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
#AFC5CA
oklch(80.8% 0.025 212.9)
-
Step 400
400
#84A8B0
oklch(70.8% 0.041 212.8)
-
Step 500
500
#65929C
oklch(63.1% 0.051 213)
-
Step 600
600
#4B7C87
oklch(55.6% 0.056 213.6)
-
Step 700
700 (this color)
#37646E
oklch(47.5% 0.052 213.7)
-
Step 800
800
#32555D
oklch(42.6% 0.043 213.9)
-
Step 900
900
#2C464C
oklch(37.6% 0.033 213.8)
-
Step 950
950
#1A292D
oklch(26.9% 0.022 216.2)
#37646E 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) | #5C616F | 0.047 |
| Deuteranopia (no green cones) | #545B6E | 0.043 |
| Tritanopia (no blue cones) | #1A6867 | 0.030 |
| Achromatopsia (no color) | #5D5D5D | 0.052 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37646E
#37646E
oklch(47.5% 0.052 213.7)
- #775249
#775249
oklch(47.6% 0.052 34.2)
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 #37646E, 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 0.033
- YInMn Blue #415A77 ΔE 0.039
- Petrol #005F6A ΔE 0.040
- Dark Green Blue #1F6357 ΔE 0.046
- Deep Turquoise #017374 ΔE 0.049
- Dark Aquamarine #017371 ΔE 0.050
- Denim #3B638C ΔE 0.051
Use #37646E 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.