#37494F
Closest named color: Dark Slate Gray (#2F4F4F). oklch(39.2% 0.025 220.2), rgb(55, 73, 79).
Aa
White text reads best on this color (9.42:1).
About this color
#37494F is a dark close to neutral grey. In OKLCH its lightness is 39%, its chroma 0.025. It has too little chroma to lean warm or cool. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.021 away. White text reads best on it, at 9.42:1.
| Hue family | Neutrals |
| Lightness | dark (39%) |
| Chroma | close to neutral grey (0.025) |
| Temperature | neutral |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.22:1 |
| White text | 9.42:1 |
Values
| HEX | #37494F |
| RGB | rgb(55, 73, 79) |
| HSL | hsl(195, 18%, 26%) |
| OKLCH | oklch(39.2% 0.025 220.2) |
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 #37494F | 9.42:1 | AAA | Lc -96.1 | Preferred for body text |
| Black text on #37494F | 2.22:1 | Fails | Lc 12.2 | Not readable |
| #37494F text on white | 9.42:1 | AAA | Lc 91.8 | Preferred for body text |
| #37494F text on black | 2.22:1 | Fails | Lc -10.6 | 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
#E6EBEC
oklch(93.7% 0.006 211)
-
Step 200
200
#D2DBDE
oklch(88.5% 0.011 219.6)
-
Step 300
300
#B4C4C9
oklch(81% 0.019 218.4)
-
Step 400
400
#8DA5AE
oklch(70.6% 0.03 222.5)
-
Step 500
500
#708F9A
oklch(63% 0.039 221.6)
-
Step 600
600
#587984
oklch(55.5% 0.041 220.5)
-
Step 700
700
#486670
oklch(49.1% 0.038 220.6)
-
Step 800
800
#3B535B
oklch(42.6% 0.032 220.5)
-
Step 900
900 (this color)
#37494F
oklch(39.2% 0.025 220.2)
-
Step 950
950
#1E282C
oklch(26.9% 0.016 224.2)
#37494F 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) | #45484F | 0.021 |
| Deuteranopia (no green cones) | #41454F | 0.019 |
| Tritanopia (no blue cones) | #2F4B4B | 0.015 |
| Achromatopsia (no color) | #464646 | 0.025 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37494F
#37494F
oklch(39.2% 0.025 220.2)
- #52413C
#52413C
oklch(39.2% 0.025 37)
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 #37494F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.021
- Charcoal #264653 ΔE 0.026
- Charcoal Grey #3C4142 ΔE 0.028
- Dark Grey Blue #29465B ΔE 0.031
- Dark Teal #014D4E ΔE 0.045
- Onyx #343A40 ΔE 0.049
- Deep Teal #00555A ΔE 0.050
- Dark Blue Green #005249 ΔE 0.053
Use #37494F 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.