#213637
Closest named color: Gunmetal (#293241). oklch(31.6% 0.027 199.7), rgb(33, 54, 55).
Aa
White text reads best on this color (12.74:1).
About this color
#213637 is a dark close to neutral grey. In OKLCH its lightness is 32%, its chroma 0.027. It has too little chroma to lean warm or cool. The nearest named color is Gunmetal (#293241), ΔE 0.029 away. White text reads best on it, at 12.74:1.
| Hue family | Neutrals |
| Lightness | dark (32%) |
| Chroma | close to neutral grey (0.027) |
| Temperature | neutral |
| Nearest name | Gunmetal (#293241) |
| Black text | 1.64:1 |
| White text | 12.74:1 |
Values
| HEX | #213637 |
| RGB | rgb(33, 54, 55) |
| HSL | hsl(183, 25%, 17%) |
| OKLCH | oklch(31.6% 0.027 199.7) |
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 #213637 | 12.74:1 | AAA | Lc -102.1 | Preferred for body text |
| Black text on #213637 | 1.64:1 | Fails | Lc 0.0 | Not readable |
| #213637 text on white | 12.74:1 | AAA | Lc 98.8 | Preferred for body text |
| #213637 text on black | 1.64:1 | Fails | Lc 0.0 | 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 950.
-
Step 50
50
#F2F6F6
oklch(97% 0.004 197.1)
-
Step 100
100
#E3ECEC
oklch(93.6% 0.01 197)
-
Step 200
200
#CCDDDE
oklch(88.5% 0.018 201.1)
-
Step 300
300
#AAC7C8
oklch(80.9% 0.031 199.1)
-
Step 400
400
#7BABAD
oklch(70.8% 0.051 199.3)
-
Step 500
500
#579699
oklch(63.2% 0.065 199.6)
-
Step 600
600
#398083
oklch(55.6% 0.071 199.1)
-
Step 700
700
#2B6C6F
oklch(49.1% 0.065 199.4)
-
Step 800
800
#25585B
oklch(42.7% 0.054 200.5)
-
Step 900
900
#24484A
oklch(37.6% 0.042 200.2)
-
Step 950
950 (this color)
#213637
oklch(31.6% 0.027 199.7)
#213637 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) | #333437 | 0.027 |
| Deuteranopia (no green cones) | #2F3137 | 0.026 |
| Tritanopia (no blue cones) | #193736 | 0.010 |
| Achromatopsia (no color) | #323232 | 0.027 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #213637
#213637
oklch(31.6% 0.027 199.7)
- #3E2C2C
#3E2C2C
oklch(31.4% 0.027 18.7)
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 #213637, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Gunmetal #293241 ΔE 0.029
- Onyx #343A40 ΔE 0.036
- Dark Blue Grey #1F3B4D ΔE 0.038
- Midnight Green #073B4C ΔE 0.039
- Space Cadet #2B2D42 ΔE 0.044
- Pakistan Green #283618 ΔE 0.051
- Jet #212529 ΔE 0.058
- Charcoal Grey #3C4142 ΔE 0.059
Use #213637 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.