#212437
Closest named color: Oxford Blue (#1B263B). oklch(26.7% 0.036 276.8), rgb(33, 36, 55).
Aa
White text reads best on this color (15.30:1).
About this color
#212437 is a dark, muted blue. In OKLCH its lightness is 27%, its chroma 0.036 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.012 away. White text reads best on it, at 15.30:1.
| Hue family | Blues |
| Lightness | dark (27%) |
| Chroma | muted (0.036) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.37:1 |
| White text | 15.30:1 |
Values
| HEX | #212437 |
| RGB | rgb(33, 36, 55) |
| HSL | hsl(232, 25%, 17%) |
| OKLCH | oklch(26.7% 0.036 276.8) |
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 #212437 | 15.30:1 | AAA | Lc -104.9 | Preferred for body text |
| Black text on #212437 | 1.37:1 | Fails | Lc 0.0 | Not readable |
| #212437 text on white | 15.30:1 | AAA | Lc 102.2 | Preferred for body text |
| #212437 text on black | 1.37:1 | 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
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E7E9F2
oklch(93.5% 0.012 276.1)
-
Step 200
200
#D5D8E9
oklch(88.5% 0.023 277.9)
-
Step 300
300
#B9BFDC
oklch(80.9% 0.041 276.2)
-
Step 400
400
#959DCB
oklch(70.6% 0.068 276.8)
-
Step 500
500
#7C85BE
oklch(63.2% 0.086 276.7)
-
Step 600
600
#656EAA
oklch(55.7% 0.094 276.4)
-
Step 700
700
#545B92
oklch(49% 0.088 277.1)
-
Step 800
800
#454B76
oklch(42.7% 0.072 276.9)
-
Step 900
900
#3A3F5F
oklch(37.8% 0.055 276.6)
-
Step 950
950 (this color)
#212437
oklch(26.7% 0.036 276.8)
#212437 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) | #1E2638 | 0.008 |
| Deuteranopia (no green cones) | #1D2437 | 0.007 |
| Tritanopia (no blue cones) | #1B282B | 0.032 |
| Achromatopsia (no color) | #252525 | 0.036 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #212437
#212437
oklch(26.7% 0.036 276.8)
- #2B2610
#2B2610
oklch(26.8% 0.037 96.8)
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 #212437, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.012
- Dark #1B2431 ΔE 0.016
- Jet #212529 ΔE 0.028
- Space Cadet #2B2D42 ΔE 0.038
- Gunmetal #293241 ΔE 0.050
- Rich Black #0D1B2A ΔE 0.051
- Prussian Blue #1D3557 ΔE 0.071
- Midnight Green #073B4C ΔE 0.077
Use #212437 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.