#212857
Closest named color: Marine (#042E60). oklch(29.9% 0.084 273.8), rgb(33, 40, 87).
Aa
White text reads best on this color (13.94:1).
About this color
#212857 is a dark, moderately saturated blue. In OKLCH its lightness is 30%, its chroma 0.084 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Marine (#042E60), ΔE 0.033 away. White text reads best on it, at 13.94:1.
| Hue family | Blues |
| Lightness | dark (30%) |
| Chroma | moderately saturated (0.084) |
| Temperature | cool |
| Nearest name | Marine (#042E60) |
| Black text | 1.50:1 |
| White text | 13.94:1 |
Values
| HEX | #212857 |
| RGB | rgb(33, 40, 87) |
| HSL | hsl(232, 45%, 24%) |
| OKLCH | oklch(29.9% 0.084 273.8) |
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 #212857 | 13.94:1 | AAA | Lc -103.5 | Preferred for body text |
| Black text on #212857 | 1.50:1 | Fails | Lc 0.0 | Not readable |
| #212857 text on white | 13.94:1 | AAA | Lc 100.4 | Preferred for body text |
| #212857 text on black | 1.50:1 | 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
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E3E9FE
oklch(93.6% 0.029 273.1)
-
Step 200
200
#CDD7FF
oklch(88.4% 0.056 274.2)
-
Step 300
300
#ADBDFF
oklch(81% 0.095 273.6)
-
Step 400
400
#8397FF
oklch(70.7% 0.153 273.6)
-
Step 500
500
#6778FF
oklch(63% 0.199 273.8)
-
Step 600
600
#515BF2
oklch(55.6% 0.223 273.7)
-
Step 700
700
#4349D3
oklch(49.1% 0.207 273.9)
-
Step 800
800
#363DAA
oklch(42.6% 0.171 273.7)
-
Step 900
900
#2E3687
oklch(37.7% 0.134 273.8)
-
Step 950
950 (this color)
#212857
oklch(29.9% 0.084 273.8)
#212857 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) | #102F59 | 0.026 |
| Deuteranopia (no green cones) | #072A56 | 0.028 |
| Tritanopia (no blue cones) | #01333B | 0.076 |
| Achromatopsia (no color) | #2C2C2C | 0.085 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #212857
#212857
oklch(29.9% 0.084 273.8)
- #382C00
#382C00
oklch(29.8% 0.061 92.6)
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 #212857, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine #042E60 ΔE 0.033
- Prussian Blue #1D3557 ΔE 0.040
- Space Cadet #2B2D42 ΔE 0.047
- Oxford Blue #1B263B ΔE 0.053
- Marine Blue #01386A ΔE 0.056
- Gunmetal #293241 ΔE 0.058
- Midnight Blue #191970 ΔE 0.060
- Dark Blue Grey #1F3B4D ΔE 0.067
Use #212857 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.