#212939
Closest named color: Oxford Blue (#1B263B). oklch(28.1% 0.032 263.9), rgb(33, 41, 57).
Aa
White text reads best on this color (14.57:1).
About this color
#212939 is a dark, muted blue. In OKLCH its lightness is 28%, its chroma 0.032 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.016 away. White text reads best on it, at 14.57:1.
| Hue family | Blues |
| Lightness | dark (28%) |
| Chroma | muted (0.032) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.44:1 |
| White text | 14.57:1 |
Values
| HEX | #212939 |
| RGB | rgb(33, 41, 57) |
| HSL | hsl(220, 27%, 18%) |
| OKLCH | oklch(28.1% 0.032 263.9) |
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 #212939 | 14.57:1 | AAA | Lc -104.2 | Preferred for body text |
| Black text on #212939 | 1.44:1 | Fails | Lc 0.0 | Not readable |
| #212939 text on white | 14.57:1 | AAA | Lc 101.4 | Preferred for body text |
| #212939 text on black | 1.44:1 | 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
#E6EAF1
oklch(93.6% 0.01 261.8)
-
Step 200
200
#D2D9E7
oklch(88.4% 0.021 264.5)
-
Step 300
300
#B4C1DA
oklch(80.9% 0.038 263.6)
-
Step 400
400
#8DA1C7
oklch(70.7% 0.06 263.1)
-
Step 500
500
#7289B9
oklch(63.1% 0.077 264.5)
-
Step 600
600
#5A73A5
oklch(55.7% 0.084 263.5)
-
Step 700
700
#4A608D
oklch(49.1% 0.077 263.8)
-
Step 800
800
#3D4E73
oklch(42.6% 0.066 264.9)
-
Step 900
900
#34415D
oklch(37.7% 0.051 264.9)
-
Step 950
950 (this color)
#212939
oklch(28.1% 0.032 263.9)
#212939 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) | #242A3A | 0.006 |
| Deuteranopia (no green cones) | #212839 | 0.003 |
| Tritanopia (no blue cones) | #1A2C2E | 0.028 |
| Achromatopsia (no color) | #292929 | 0.032 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #212939
#212939
oklch(28.1% 0.032 263.9)
- #312816
#312816
oklch(28.2% 0.033 83.9)
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 #212939, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.016
- Dark #1B2431 ΔE 0.023
- Space Cadet #2B2D42 ΔE 0.027
- Jet #212529 ΔE 0.029
- Gunmetal #293241 ΔE 0.035
- Prussian Blue #1D3557 ΔE 0.059
- Midnight Green #073B4C ΔE 0.062
- Dark Blue Grey #1F3B4D ΔE 0.062
Use #212939 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.