#212B53
Closest named color: Prussian Blue (#1D3557). oklch(30.3% 0.073 270.9), rgb(33, 43, 83).
Aa
White text reads best on this color (13.67:1).
About this color
#212B53 is a dark, moderately saturated blue. In OKLCH its lightness is 30%, its chroma 0.073 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.031 away. White text reads best on it, at 13.67:1.
| Hue family | Blues |
| Lightness | dark (30%) |
| Chroma | moderately saturated (0.073) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.53:1 |
| White text | 13.67:1 |
Values
| HEX | #212B53 |
| RGB | rgb(33, 43, 83) |
| HSL | hsl(228, 43%, 23%) |
| OKLCH | oklch(30.3% 0.073 270.9) |
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 #212B53 | 13.67:1 | AAA | Lc -103.2 | Preferred for body text |
| Black text on #212B53 | 1.53:1 | Fails | Lc 0.0 | Not readable |
| #212B53 text on white | 13.67:1 | AAA | Lc 100.1 | Preferred for body text |
| #212B53 text on black | 1.53:1 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E3E9FB
oklch(93.5% 0.025 271.1)
-
Step 200
200
#CDD8FA
oklch(88.5% 0.048 271.2)
-
Step 300
300
#ACBEFA
oklch(80.9% 0.087 271.4)
-
Step 400
400
#819AF7
oklch(70.7% 0.139 271.1)
-
Step 500
500
#637EF3
oklch(63.1% 0.177 270.8)
-
Step 600
600
#4C64E2
oklch(55.6% 0.193 270.7)
-
Step 700
700
#3E52C4
oklch(49.1% 0.178 270.8)
-
Step 800
800
#33449F
oklch(42.8% 0.148 270.8)
-
Step 900
900
#2C3A7E
oklch(37.7% 0.116 271.1)
-
Step 950
950 (this color)
#212B53
oklch(30.3% 0.073 270.9)
#212B53 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) | #193055 | 0.017 |
| Deuteranopia (no green cones) | #132B52 | 0.018 |
| Tritanopia (no blue cones) | #06343B | 0.065 |
| Achromatopsia (no color) | #2D2D2D | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #212B53
#212B53
oklch(30.3% 0.073 270.9)
- #3A2D00
#3A2D00
oklch(30.3% 0.062 91.5)
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 #212B53, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.031
- Marine #042E60 ΔE 0.034
- Space Cadet #2B2D42 ΔE 0.036
- Oxford Blue #1B263B ΔE 0.046
- Gunmetal #293241 ΔE 0.046
- Marine Blue #01386A ΔE 0.054
- Dark Blue Grey #1F3B4D ΔE 0.056
- Midnight Green #073B4C ΔE 0.059
Use #212B53 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.