#212C55
Closest named color: Prussian Blue (#1D3557). oklch(30.6% 0.075 270.2), rgb(33, 44, 85).
Aa
White text reads best on this color (13.49:1).
About this color
#212C55 is a dark, moderately saturated blue. In OKLCH its lightness is 31%, its chroma 0.075 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.028 away. White text reads best on it, at 13.49:1.
| Hue family | Blues |
| Lightness | dark (31%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.55:1 |
| White text | 13.49:1 |
Values
| HEX | #212C55 |
| RGB | rgb(33, 44, 85) |
| HSL | hsl(227, 44%, 23%) |
| OKLCH | oklch(30.6% 0.075 270.2) |
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 #212C55 | 13.49:1 | AAA | Lc -103.0 | Preferred for body text |
| Black text on #212C55 | 1.55:1 | Fails | Lc 0.0 | Not readable |
| #212C55 text on white | 13.49:1 | AAA | Lc 99.8 | Preferred for body text |
| #212C55 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E3E9FC
oklch(93.5% 0.027 271.9)
-
Step 200
200
#CCD8FB
oklch(88.4% 0.05 270.4)
-
Step 300
300
#AABEFB
oklch(80.8% 0.089 270.3)
-
Step 400
400
#7F9AF9
oklch(70.7% 0.142 270.4)
-
Step 500
500
#607EF6
oklch(63.1% 0.182 270)
-
Step 600
600
#4A63E5
oklch(55.6% 0.198 270.4)
-
Step 700
700
#3B51C7
oklch(49% 0.184 270.1)
-
Step 800
800
#3143A1
oklch(42.7% 0.153 270.3)
-
Step 900
900
#2A3A80
oklch(37.7% 0.119 270.1)
-
Step 950
950 (this color)
#212C55
oklch(30.6% 0.075 270.2)
#212C55 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) | #1A3157 | 0.016 |
| Deuteranopia (no green cones) | #132C54 | 0.017 |
| Tritanopia (no blue cones) | #03353C | 0.067 |
| Achromatopsia (no color) | #2E2E2E | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #212C55
#212C55
oklch(30.6% 0.075 270.2)
- #3C2D00
#3C2D00
oklch(30.6% 0.062 88.7)
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 #212C55, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.028
- Marine #042E60 ΔE 0.032
- Space Cadet #2B2D42 ΔE 0.038
- Gunmetal #293241 ΔE 0.047
- Oxford Blue #1B263B ΔE 0.050
- Marine Blue #01386A ΔE 0.050
- Dark Blue Grey #1F3B4D ΔE 0.054
- Midnight Green #073B4C ΔE 0.057
Use #212C55 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.