#213638
Closest named color: Gunmetal (#293241). oklch(31.6% 0.027 203.5), rgb(33, 54, 56).
Aa
White text reads best on this color (12.73:1).
About this color
#213638 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 0.027 away. White text reads best on it, at 12.73:1.
| 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 | 12.73:1 |
Values
| HEX | #213638 |
| RGB | rgb(33, 54, 56) |
| HSL | hsl(185, 26%, 17%) |
| OKLCH | oklch(31.6% 0.027 203.5) |
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 #213638 | 12.73:1 | AAA | Lc -102.1 | Preferred for body text |
| Black text on #213638 | 1.64:1 | Fails | Lc 0.0 | Not readable |
| #213638 text on white | 12.73:1 | AAA | Lc 98.8 | Preferred for body text |
| #213638 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
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E3ECEC
oklch(93.6% 0.01 197)
-
Step 200
200
#CCDDDE
oklch(88.5% 0.018 201.1)
-
Step 300
300
#AAC7CA
oklch(80.9% 0.032 204.2)
-
Step 400
400
#7BAAAF
oklch(70.6% 0.051 204.3)
-
Step 500
500
#57959B
oklch(63% 0.065 203.6)
-
Step 600
600
#398086
oklch(55.7% 0.071 202.8)
-
Step 700
700
#2A6C72
oklch(49.2% 0.067 203.5)
-
Step 800
800
#25585C
oklch(42.8% 0.055 202.3)
-
Step 900
900
#24484C
oklch(37.7% 0.042 204.9)
-
Step 950
950 (this color)
#213638
oklch(31.6% 0.027 203.5)
#213638 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) | #333438 | 0.027 |
| Deuteranopia (no green cones) | #2F3138 | 0.026 |
| Tritanopia (no blue cones) | #183837 | 0.012 |
| Achromatopsia (no color) | #323232 | 0.027 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #213638
#213638
oklch(31.6% 0.027 203.5)
- #3F2D2B
#3F2D2B
oklch(31.7% 0.027 25.9)
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 #213638, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Gunmetal #293241 ΔE 0.027
- Onyx #343A40 ΔE 0.035
- Dark Blue Grey #1F3B4D ΔE 0.037
- Midnight Green #073B4C ΔE 0.038
- Space Cadet #2B2D42 ΔE 0.042
- Pakistan Green #283618 ΔE 0.052
- Prussian Blue #1D3557 ΔE 0.057
- Jet #212529 ΔE 0.058
Use #213638 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.