#21373C
Closest named color: Gunmetal (#293241). oklch(32.1% 0.029 213.6), rgb(33, 55, 60).
Aa
White text reads best on this color (12.52:1).
About this color
#21373C is a dark close to neutral grey. In OKLCH its lightness is 32%, its chroma 0.029. It has too little chroma to lean warm or cool. The nearest named color is Gunmetal (#293241), ΔE 0.024 away. White text reads best on it, at 12.52:1.
| Hue family | Neutrals |
| Lightness | dark (32%) |
| Chroma | close to neutral grey (0.029) |
| Temperature | neutral |
| Nearest name | Gunmetal (#293241) |
| Black text | 1.67:1 |
| White text | 12.52:1 |
Values
| HEX | #21373C |
| RGB | rgb(33, 55, 60) |
| HSL | hsl(191, 29%, 18%) |
| OKLCH | oklch(32.1% 0.029 213.6) |
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 #21373C | 12.52:1 | AAA | Lc -101.8 | Preferred for body text |
| Black text on #21373C | 1.67:1 | Fails | Lc 0.0 | Not readable |
| #21373C text on white | 12.52:1 | AAA | Lc 98.4 | Preferred for body text |
| #21373C text on black | 1.67:1 | 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
#E3ECEE
oklch(93.7% 0.01 212.5)
-
Step 200
200
#CCDDE1
oklch(88.6% 0.019 213.4)
-
Step 300
300
#A8C7CE
oklch(80.9% 0.035 212.9)
-
Step 400
400
#78AAB5
oklch(70.7% 0.055 212.8)
-
Step 500
500
#5395A3
oklch(63.1% 0.07 212.9)
-
Step 600
600
#347F8E
oklch(55.6% 0.077 213)
-
Step 700
700
#266B79
oklch(49.1% 0.071 213.6)
-
Step 800
800
#215763
oklch(42.6% 0.059 214.8)
-
Step 900
900
#214850
oklch(37.7% 0.046 212.7)
-
Step 950
950 (this color)
#21373C
oklch(32.1% 0.029 213.6)
#21373C 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) | #33363C | 0.026 |
| Deuteranopia (no green cones) | #2F323C | 0.025 |
| Tritanopia (no blue cones) | #163938 | 0.017 |
| Achromatopsia (no color) | #343434 | 0.029 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21373C
#21373C
oklch(32.1% 0.029 213.6)
- #412E29
#412E29
oklch(32.2% 0.03 35.3)
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 #21373C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Gunmetal #293241 ΔE 0.024
- Dark Blue Grey #1F3B4D ΔE 0.030
- Onyx #343A40 ΔE 0.031
- Midnight Green #073B4C ΔE 0.032
- Space Cadet #2B2D42 ΔE 0.040
- Prussian Blue #1D3557 ΔE 0.051
- Charcoal Grey #3C4142 ΔE 0.055
- Charcoal #264653 ΔE 0.057
Use #21373C 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.