#212A53
Closest named color: Prussian Blue (#1D3557). oklch(30% 0.075 271.9), rgb(33, 42, 83).
Aa
White text reads best on this color (13.80:1).
About this color
#212A53 is a dark, moderately saturated blue. In OKLCH its lightness is 30%, its chroma 0.075 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.034 away. White text reads best on it, at 13.80:1.
| Hue family | Blues |
| Lightness | dark (30%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.52:1 |
| White text | 13.80:1 |
Values
| HEX | #212A53 |
| RGB | rgb(33, 42, 83) |
| HSL | hsl(229, 43%, 23%) |
| OKLCH | oklch(30% 0.075 271.9) |
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 #212A53 | 13.80:1 | AAA | Lc -103.3 | Preferred for body text |
| Black text on #212A53 | 1.52:1 | Fails | Lc 0.0 | Not readable |
| #212A53 text on white | 13.80:1 | AAA | Lc 100.3 | Preferred for body text |
| #212A53 text on black | 1.52:1 | 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
#E4E9FC
oklch(93.6% 0.026 274.1)
-
Step 200
200
#CDD8FB
oklch(88.5% 0.05 271.6)
-
Step 300
300
#ACBEFB
oklch(81% 0.089 271.6)
-
Step 400
400
#8299F9
oklch(70.7% 0.143 272.1)
-
Step 500
500
#657DF5
oklch(63.2% 0.18 271.8)
-
Step 600
600
#4E62E4
oklch(55.5% 0.197 271.8)
-
Step 700
700
#4050C6
oklch(49% 0.183 271.9)
-
Step 800
800
#3443A0
oklch(42.7% 0.151 271.5)
-
Step 900
900
#2D397F
oklch(37.6% 0.118 272.1)
-
Step 950
950 (this color)
#212A53
oklch(30% 0.075 271.9)
#212A53 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) | #182F55 | 0.018 |
| Deuteranopia (no green cones) | #112B52 | 0.020 |
| Tritanopia (no blue cones) | #06333A | 0.067 |
| Achromatopsia (no color) | #2D2D2D | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #212A53
#212A53
oklch(30% 0.075 271.9)
- #392C00
#392C00
oklch(29.9% 0.061 91.2)
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 #212A53, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.034
- Marine #042E60 ΔE 0.035
- Space Cadet #2B2D42 ΔE 0.038
- Oxford Blue #1B263B ΔE 0.046
- Gunmetal #293241 ΔE 0.049
- Marine Blue #01386A ΔE 0.056
- Dark Blue Grey #1F3B4D ΔE 0.059
- Midnight Green #073B4C ΔE 0.062
Use #212A53 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.