#212B5A
Closest named color: Marine (#042E60). oklch(30.8% 0.085 271.6), rgb(33, 43, 90).
Aa
White text reads best on this color (13.48:1).
About this color
#212B5A is a dark, moderately saturated blue. In OKLCH its lightness is 31%, its chroma 0.085 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Marine (#042E60), ΔE 0.029 away. White text reads best on it, at 13.48:1.
| Hue family | Blues |
| Lightness | dark (31%) |
| Chroma | moderately saturated (0.085) |
| Temperature | cool |
| Nearest name | Marine (#042E60) |
| Black text | 1.55:1 |
| White text | 13.48:1 |
Values
| HEX | #212B5A |
| RGB | rgb(33, 43, 90) |
| HSL | hsl(229, 46%, 24%) |
| OKLCH | oklch(30.8% 0.085 271.6) |
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 #212B5A | 13.48:1 | AAA | Lc -102.9 | Preferred for body text |
| Black text on #212B5A | 1.55:1 | Fails | Lc 0.0 | Not readable |
| #212B5A text on white | 13.48:1 | AAA | Lc 99.8 | Preferred for body text |
| #212B5A text on black | 1.55:1 | 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
#CCD8FF
oklch(88.6% 0.055 271.8)
-
Step 300
300
#AABDFF
oklch(80.8% 0.096 271.7)
-
Step 400
400
#7F98FF
oklch(70.6% 0.153 271.7)
-
Step 500
500
#617AFF
oklch(63% 0.198 271.6)
-
Step 600
600
#4A5DF3
oklch(55.6% 0.223 271.4)
-
Step 700
700
#3C4BD4
oklch(49.1% 0.208 271.4)
-
Step 800
800
#313FAB
oklch(42.8% 0.172 271.3)
-
Step 900
900
#2A3787
oklch(37.7% 0.134 271.4)
-
Step 950
950 (this color)
#212B5A
oklch(30.8% 0.085 271.6)
#212B5A 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) | #14315C | 0.021 |
| Deuteranopia (no green cones) | #0A2C59 | 0.025 |
| Tritanopia (no blue cones) | #00363E | 0.075 |
| Achromatopsia (no color) | #2F2F2F | 0.085 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #212B5A
#212B5A
oklch(30.8% 0.085 271.6)
- #3B2E00
#3B2E00
oklch(30.7% 0.063 91.8)
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 #212B5A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine #042E60 ΔE 0.029
- Prussian Blue #1D3557 ΔE 0.032
- Marine Blue #01386A ΔE 0.047
- Space Cadet #2B2D42 ΔE 0.048
- Gunmetal #293241 ΔE 0.056
- Oxford Blue #1B263B ΔE 0.058
- Dark Blue Grey #1F3B4D ΔE 0.061
- Midnight Blue #191970 ΔE 0.062
Use #212B5A 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.