#21333D
Closest named color: Gunmetal (#293241). oklch(31% 0.03 233.3), rgb(33, 51, 61).
Aa
White text reads best on this color (13.07:1).
About this color
#21333D is a dark close to neutral grey. In OKLCH its lightness is 31%, its chroma 0.030. It has too little chroma to lean warm or cool. The nearest named color is Gunmetal (#293241), ΔE 0.015 away. White text reads best on it, at 13.07:1.
| Hue family | Neutrals |
| Lightness | dark (31%) |
| Chroma | close to neutral grey (0.030) |
| Temperature | neutral |
| Nearest name | Gunmetal (#293241) |
| Black text | 1.60:1 |
| White text | 13.07:1 |
Values
| HEX | #21333D |
| RGB | rgb(33, 51, 61) |
| HSL | hsl(201, 30%, 18%) |
| OKLCH | oklch(31% 0.03 233.3) |
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 #21333D | 13.07:1 | AAA | Lc -102.6 | Preferred for body text |
| Black text on #21333D | 1.60:1 | Fails | Lc 0.0 | Not readable |
| #21333D text on white | 13.07:1 | AAA | Lc 99.3 | Preferred for body text |
| #21333D text on black | 1.60:1 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E4EBF0
oklch(93.6% 0.01 238.5)
-
Step 200
200
#CDDCE4
oklch(88.6% 0.02 230.7)
-
Step 300
300
#ABC5D4
oklch(80.9% 0.035 233.2)
-
Step 400
400
#7EA7BE
oklch(70.7% 0.056 233.1)
-
Step 500
500
#5C91AE
oklch(63.1% 0.071 233.5)
-
Step 600
600
#407B9A
oklch(55.6% 0.078 233.5)
-
Step 700
700
#326883
oklch(49.2% 0.072 232.5)
-
Step 800
800
#2A546B
oklch(42.6% 0.061 234.6)
-
Step 900
900
#274657
oklch(37.8% 0.047 233.9)
-
Step 950
950 (this color)
#21333D
oklch(31% 0.03 233.3)
#21333D 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) | #2E323E | 0.020 |
| Deuteranopia (no green cones) | #2A2F3D | 0.018 |
| Tritanopia (no blue cones) | #163636 | 0.023 |
| Achromatopsia (no color) | #313131 | 0.030 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21333D
#21333D
oklch(31% 0.03 233.3)
- #3C2C22
#3C2C22
oklch(30.9% 0.029 53.3)
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 #21333D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Gunmetal #293241 ΔE 0.015
- Space Cadet #2B2D42 ΔE 0.028
- Dark Blue Grey #1F3B4D ΔE 0.034
- Midnight Green #073B4C ΔE 0.035
- Onyx #343A40 ΔE 0.039
- Prussian Blue #1D3557 ΔE 0.046
- Oxford Blue #1B263B ΔE 0.046
- Jet #212529 ΔE 0.052
Use #21333D 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.