#37494C
Closest named color: Dark Slate Gray (#2F4F4F). oklch(39.1% 0.023 208.8), rgb(55, 73, 76).
Aa
White text reads best on this color (9.46:1).
About this color
#37494C is a dark close to neutral grey. In OKLCH its lightness is 39%, its chroma 0.023. It has too little chroma to lean warm or cool. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.020 away. White text reads best on it, at 9.46:1.
| Hue family | Neutrals |
| Lightness | dark (39%) |
| Chroma | close to neutral grey (0.023) |
| Temperature | neutral |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.21:1 |
| White text | 9.46:1 |
Values
| HEX | #37494C |
| RGB | rgb(55, 73, 76) |
| HSL | hsl(189, 16%, 26%) |
| OKLCH | oklch(39.1% 0.023 208.8) |
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 #37494C | 9.46:1 | AAA | Lc -96.1 | Preferred for body text |
| Black text on #37494C | 2.21:1 | Fails | Lc 12.1 | Not readable |
| #37494C text on white | 9.46:1 | AAA | Lc 91.9 | Preferred for body text |
| #37494C text on black | 2.21:1 | Fails | Lc -10.5 | 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
#D2DBDC
oklch(88.5% 0.01 204.9)
-
Step 300
300
#B4C4C7
oklch(80.9% 0.018 210.2)
-
Step 400
400
#8DA6AA
oklch(70.7% 0.028 208.3)
-
Step 500
500
#719095
oklch(63.1% 0.036 208.4)
-
Step 600
600
#597A7F
oklch(55.6% 0.038 207.7)
-
Step 700
700
#49676C
oklch(49.2% 0.036 208.9)
-
Step 800
800
#3C5458
oklch(42.8% 0.03 208.9)
-
Step 900
900 (this color)
#37494C
oklch(39.1% 0.023 208.8)
-
Step 950
950
#1E292A
oklch(27.1% 0.015 203.2)
#37494C 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) | #46484C | 0.022 |
| Deuteranopia (no green cones) | #42454C | 0.020 |
| Tritanopia (no blue cones) | #304B4A | 0.012 |
| Achromatopsia (no color) | #464646 | 0.023 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37494C
#37494C
oklch(39.1% 0.023 208.8)
- #51413E
#51413E
oklch(39.1% 0.023 30.5)
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 #37494C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.020
- Charcoal Grey #3C4142 ΔE 0.026
- Charcoal #264653 ΔE 0.028
- Dark Grey Blue #29465B ΔE 0.035
- Dark Teal #014D4E ΔE 0.043
- Onyx #343A40 ΔE 0.049
- Deep Teal #00555A ΔE 0.050
- Dark Blue Green #005249 ΔE 0.051
Use #37494C 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.