#212C56
Closest named color: Prussian Blue (#1D3557). oklch(30.7% 0.077 270.3), rgb(33, 44, 86).
Aa
White text reads best on this color (13.46:1).
About this color
#212C56 is a dark, moderately saturated blue. In OKLCH its lightness is 31%, its chroma 0.077 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 13.46:1.
| Hue family | Blues |
| Lightness | dark (31%) |
| Chroma | moderately saturated (0.077) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.55:1 |
| White text | 13.46:1 |
Values
| HEX | #212C56 |
| RGB | rgb(33, 44, 86) |
| HSL | hsl(228, 45%, 23%) |
| OKLCH | oklch(30.7% 0.077 270.3) |
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 #212C56 | 13.46:1 | AAA | Lc -103.0 | Preferred for body text |
| Black text on #212C56 | 1.55:1 | Fails | Lc 0.0 | Not readable |
| #212C56 text on white | 13.46:1 | AAA | Lc 99.8 | Preferred for body text |
| #212C56 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
#CCD8FC
oklch(88.5% 0.051 270.8)
-
Step 300
300
#AABEFC
oklch(80.9% 0.091 270.5)
-
Step 400
400
#7E9AFB
oklch(70.7% 0.146 270.2)
-
Step 500
500
#607DF8
oklch(63.1% 0.186 270.3)
-
Step 600
600
#4962E7
oklch(55.5% 0.202 270.3)
-
Step 700
700
#3B50C9
oklch(49% 0.188 270.3)
-
Step 800
800
#3143A3
oklch(42.8% 0.156 270.4)
-
Step 900
900
#2A3A81
oklch(37.8% 0.121 270.1)
-
Step 950
950 (this color)
#212C56
oklch(30.7% 0.077 270.3)
#212C56 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) | #193158 | 0.017 |
| Deuteranopia (no green cones) | #122C55 | 0.018 |
| Tritanopia (no blue cones) | #02353C | 0.069 |
| Achromatopsia (no color) | #2F2F2F | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #212C56
#212C56
oklch(30.7% 0.077 270.3)
- #3C2E00
#3C2E00
oklch(30.8% 0.063 90.4)
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 #212C56, 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 0.031
- Space Cadet #2B2D42 ΔE 0.040
- Gunmetal #293241 ΔE 0.049
- Marine Blue #01386A ΔE 0.049
- Oxford Blue #1B263B ΔE 0.052
- Dark Blue Grey #1F3B4D ΔE 0.055
- Midnight Green #073B4C ΔE 0.058
Use #212C56 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.