#21324E
Closest named color: Prussian Blue (#1D3557). oklch(31.7% 0.055 260), rgb(33, 50, 78).
Aa
White text reads best on this color (12.87:1).
About this color
#21324E is a dark, muted blue. In OKLCH its lightness is 32%, its chroma 0.055 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.017 away. White text reads best on it, at 12.87:1.
| Hue family | Blues |
| Lightness | dark (32%) |
| Chroma | muted (0.055) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.63:1 |
| White text | 12.87:1 |
Values
| HEX | #21324E |
| RGB | rgb(33, 50, 78) |
| HSL | hsl(217, 41%, 22%) |
| OKLCH | oklch(31.7% 0.055 260) |
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 #21324E | 12.87:1 | AAA | Lc -102.3 | Preferred for body text |
| Black text on #21324E | 1.63:1 | Fails | Lc 0.0 | Not readable |
| #21324E text on white | 12.87:1 | AAA | Lc 99.0 | Preferred for body text |
| #21324E text on black | 1.63:1 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EAF7
oklch(93.6% 0.019 263)
-
Step 200
200
#CBDAF2
oklch(88.5% 0.037 259.8)
-
Step 300
300
#A8C2EC
oklch(80.9% 0.066 259.9)
-
Step 400
400
#7AA1E2
oklch(70.7% 0.105 260.3)
-
Step 500
500
#5889DA
oklch(63.2% 0.134 260)
-
Step 600
600
#3D71C7
oklch(55.7% 0.145 259.9)
-
Step 700
700
#2F5EAC
oklch(49.1% 0.135 260)
-
Step 800
800
#284D8B
oklch(42.7% 0.111 260.1)
-
Step 900
900
#25416F
oklch(37.8% 0.086 259.8)
-
Step 950
950 (this color)
#21324E
oklch(31.7% 0.055 260)
#21324E 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) | #27344F | 0.011 |
| Deuteranopia (no green cones) | #22304D | 0.006 |
| Tritanopia (no blue cones) | #0A383C | 0.049 |
| Achromatopsia (no color) | #323232 | 0.055 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21324E
#21324E
oklch(31.7% 0.055 260)
- #412E0C
#412E0C
oklch(31.6% 0.055 78.5)
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 #21324E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.017
- Gunmetal #293241 ΔE 0.026
- Space Cadet #2B2D42 ΔE 0.026
- Dark Blue Grey #1F3B4D ΔE 0.030
- Midnight Green #073B4C ΔE 0.036
- Marine #042E60 ΔE 0.045
- Oxford Blue #1B263B ΔE 0.049
- Onyx #343A40 ΔE 0.051
Use #21324E 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.