#213437
Closest named color: Gunmetal (#293241). oklch(31% 0.025 208.3), rgb(33, 52, 55).
Aa
White text reads best on this color (13.03:1).
About this color
#213437 is a dark close to neutral grey. In OKLCH its lightness is 31%, its chroma 0.025. It has too little chroma to lean warm or cool. The nearest named color is Gunmetal (#293241), ΔE 0.025 away. White text reads best on it, at 13.03:1.
| Hue family | Neutrals |
| Lightness | dark (31%) |
| Chroma | close to neutral grey (0.025) |
| Temperature | neutral |
| Nearest name | Gunmetal (#293241) |
| Black text | 1.61:1 |
| White text | 13.03:1 |
Values
| HEX | #213437 |
| RGB | rgb(33, 52, 55) |
| HSL | hsl(188, 25%, 17%) |
| OKLCH | oklch(31% 0.025 208.3) |
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 #213437 | 13.03:1 | AAA | Lc -102.5 | Preferred for body text |
| Black text on #213437 | 1.61:1 | Fails | Lc 0.0 | Not readable |
| #213437 text on white | 13.03:1 | AAA | Lc 99.3 | Preferred for body text |
| #213437 text on black | 1.61:1 | 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
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E4ECED
oklch(93.7% 0.009 205.9)
-
Step 200
200
#CDDCDF
oklch(88.4% 0.017 211)
-
Step 300
300
#ABC6CB
oklch(80.8% 0.03 210.1)
-
Step 400
400
#7EA9B0
oklch(70.6% 0.047 208.6)
-
Step 500
500
#5C949D
oklch(63.1% 0.06 208.7)
-
Step 600
600
#3F7E88
oklch(55.5% 0.066 209)
-
Step 700
700
#316A73
oklch(49% 0.061 209)
-
Step 800
800
#2A575E
oklch(42.8% 0.051 208.7)
-
Step 900
900
#27484D
oklch(37.9% 0.04 208.1)
-
Step 950
950 (this color)
#213437
oklch(31% 0.025 208.3)
#213437 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) | #313337 | 0.024 |
| Deuteranopia (no green cones) | #2D3037 | 0.021 |
| Tritanopia (no blue cones) | #193635 | 0.013 |
| Achromatopsia (no color) | #313131 | 0.025 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #213437
#213437
oklch(31% 0.025 208.3)
- #3C2C29
#3C2C29
oklch(31.1% 0.024 30.6)
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 #213437, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Gunmetal #293241 ΔE 0.025
- Space Cadet #2B2D42 ΔE 0.039
- Onyx #343A40 ΔE 0.039
- Dark Blue Grey #1F3B4D ΔE 0.040
- Midnight Green #073B4C ΔE 0.040
- Jet #212529 ΔE 0.052
- Oxford Blue #1B263B ΔE 0.053
- Pakistan Green #283618 ΔE 0.054
Use #213437 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.