#21383A
Closest named color: Gunmetal (#293241). oklch(32.3% 0.029 202.8), rgb(33, 56, 58).
Aa
White text reads best on this color (12.41:1).
About this color
#21383A 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 0.029 away. White text reads best on it, at 12.41:1.
| Hue family | Neutrals |
| Lightness | dark (32%) |
| Chroma | close to neutral grey (0.029) |
| Temperature | neutral |
| Nearest name | Gunmetal (#293241) |
| Black text | 1.69:1 |
| White text | 12.41:1 |
Values
| HEX | #21383A |
| RGB | rgb(33, 56, 58) |
| HSL | hsl(185, 27%, 18%) |
| OKLCH | oklch(32.3% 0.029 202.8) |
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 #21383A | 12.41:1 | AAA | Lc -101.6 | Preferred for body text |
| Black text on #21383A | 1.69:1 | Fails | Lc 0.0 | Not readable |
| #21383A text on white | 12.41:1 | AAA | Lc 98.2 | Preferred for body text |
| #21383A text on black | 1.69:1 | 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
#E3ECED
oklch(93.7% 0.01 204.9)
-
Step 200
200
#CBDDDF
oklch(88.5% 0.019 204.8)
-
Step 300
300
#A8C8CA
oklch(81% 0.034 201.2)
-
Step 400
400
#77ABB0
oklch(70.7% 0.055 203.5)
-
Step 500
500
#51969C
oklch(63% 0.07 202.9)
-
Step 600
600
#318087
oklch(55.5% 0.076 203.4)
-
Step 700
700
#236C72
oklch(49% 0.071 202.9)
-
Step 800
800
#1F585D
oklch(42.6% 0.059 203.3)
-
Step 900
900
#20494C
oklch(37.7% 0.046 201.8)
-
Step 950
950 (this color)
#21383A
oklch(32.3% 0.029 202.8)
#21383A 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) | #35363A | 0.030 |
| Deuteranopia (no green cones) | #30333A | 0.026 |
| Tritanopia (no blue cones) | #173A39 | 0.013 |
| Achromatopsia (no color) | #343434 | 0.029 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21383A
#21383A
oklch(32.3% 0.029 202.8)
- #412E2D
#412E2D
oklch(32.3% 0.028 22.2)
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 #21383A, 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 0.031
- Dark Blue Grey #1F3B4D ΔE 0.033
- Midnight Green #073B4C ΔE 0.035
- Space Cadet #2B2D42 ΔE 0.046
- Charcoal Grey #3C4142 ΔE 0.053
- Pakistan Green #283618 ΔE 0.054
- Prussian Blue #1D3557 ΔE 0.056
Use #21383A 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.