#21333E
Closest named color: Gunmetal (#293241). oklch(31% 0.031 235.9), rgb(33, 51, 62).
Aa
White text reads best on this color (13.06:1).
About this color
#21333E is a dark, muted blue. In OKLCH its lightness is 31%, its chroma 0.031 and its hue 236°. Its hue sits on the cool side of the wheel. The nearest named color is Gunmetal (#293241), ΔE 0.014 away. White text reads best on it, at 13.06:1.
| Hue family | Blues |
| Lightness | dark (31%) |
| Chroma | muted (0.031) |
| Temperature | cool |
| Nearest name | Gunmetal (#293241) |
| Black text | 1.60:1 |
| White text | 13.06:1 |
Values
| HEX | #21333E |
| RGB | rgb(33, 51, 62) |
| HSL | hsl(203, 31%, 19%) |
| OKLCH | oklch(31% 0.031 235.9) |
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 #21333E | 13.06:1 | AAA | Lc -102.5 | Preferred for body text |
| Black text on #21333E | 1.60:1 | Fails | Lc 0.0 | Not readable |
| #21333E text on white | 13.06:1 | AAA | Lc 99.3 | Preferred for body text |
| #21333E 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
#CDDCE5
oklch(88.6% 0.02 233.9)
-
Step 300
300
#ABC5D5
oklch(80.9% 0.036 234.9)
-
Step 400
400
#7EA7C0
oklch(70.7% 0.058 235.4)
-
Step 500
500
#5B91B1
oklch(63.2% 0.075 235.7)
-
Step 600
600
#407B9C
oklch(55.7% 0.08 235.2)
-
Step 700
700
#316786
oklch(49.1% 0.076 236.3)
-
Step 800
800
#2A546D
oklch(42.7% 0.063 236.9)
-
Step 900
900
#274658
oklch(37.8% 0.048 235.5)
-
Step 950
950 (this color)
#21333E
oklch(31% 0.031 235.9)
#21333E 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) | #2E333F | 0.020 |
| Deuteranopia (no green cones) | #2A2F3E | 0.018 |
| Tritanopia (no blue cones) | #163637 | 0.023 |
| Achromatopsia (no color) | #313131 | 0.031 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21333E
#21333E
oklch(31% 0.031 235.9)
- #3D2C21
#3D2C21
oklch(31% 0.032 54.1)
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 #21333E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Gunmetal #293241 ΔE 0.014
- Space Cadet #2B2D42 ΔE 0.027
- Dark Blue Grey #1F3B4D ΔE 0.032
- Midnight Green #073B4C ΔE 0.034
- Onyx #343A40 ΔE 0.039
- Prussian Blue #1D3557 ΔE 0.044
- Oxford Blue #1B263B ΔE 0.046
- Jet #212529 ΔE 0.053
Use #21333E 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.