#37484B
Closest named color: Dark Slate Gray (#2F4F4F). oklch(38.8% 0.022 209.5), rgb(55, 72, 75).
Aa
White text reads best on this color (9.58:1).
About this color
#37484B is a dark close to neutral grey. In OKLCH its lightness is 39%, its chroma 0.022. It has too little chroma to lean warm or cool. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.023 away. White text reads best on it, at 9.58:1.
| Hue family | Neutrals |
| Lightness | dark (39%) |
| Chroma | close to neutral grey (0.022) |
| Temperature | neutral |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.19:1 |
| White text | 9.58:1 |
Values
| HEX | #37484B |
| RGB | rgb(55, 72, 75) |
| HSL | hsl(189, 15%, 25%) |
| OKLCH | oklch(38.8% 0.022 209.5) |
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 #37484B | 9.58:1 | AAA | Lc -96.4 | Preferred for body text |
| Black text on #37484B | 2.19:1 | Fails | Lc 11.8 | Not readable |
| #37484B text on white | 9.58:1 | AAA | Lc 92.2 | Preferred for body text |
| #37484B text on black | 2.19:1 | Fails | Lc -10.2 | Not readable |
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 900.
-
Step 50
50
#F4F6F6
oklch(97.2% 0.002 197.1)
-
Step 100
100
#E6EBEB
oklch(93.6% 0.005 197.1)
-
Step 200
200
#D3DBDC
oklch(88.6% 0.009 205.9)
-
Step 300
300
#B5C4C6
oklch(80.9% 0.017 206.4)
-
Step 400
400
#8EA5AA
oklch(70.6% 0.027 212.3)
-
Step 500
500
#728F95
oklch(63% 0.034 211.7)
-
Step 600
600
#5A7A7F
oklch(55.7% 0.037 208.1)
-
Step 700
700
#4A666B
oklch(49% 0.034 209.7)
-
Step 800
800
#3D5357
oklch(42.6% 0.028 209.9)
-
Step 900
900 (this color)
#37484B
oklch(38.8% 0.022 209.5)
-
Step 950
950
#1F282A
oklch(26.9% 0.013 212.7)
#37484B 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) | #45474B | 0.021 |
| Deuteranopia (no green cones) | #42444B | 0.020 |
| Tritanopia (no blue cones) | #314A49 | 0.011 |
| Achromatopsia (no color) | #454545 | 0.022 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37484B
#37484B
oklch(38.8% 0.022 209.5)
- #50403E
#50403E
oklch(38.8% 0.023 26.5)
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 #37484B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.023
- Charcoal Grey #3C4142 ΔE 0.023
- Charcoal #264653 ΔE 0.027
- Dark Grey Blue #29465B ΔE 0.034
- Dark Teal #014D4E ΔE 0.044
- Onyx #343A40 ΔE 0.045
- Dark Blue Green #005249 ΔE 0.052
- Deep Teal #00555A ΔE 0.052
Use #37484B 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.