#21335E
Closest named color: Prussian Blue (#1D3557). oklch(33% 0.08 265.2), rgb(33, 51, 94).
Aa
White text reads best on this color (12.35:1).
About this color
#21335E is a dark, moderately saturated blue. In OKLCH its lightness is 33%, its chroma 0.080 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.016 away. White text reads best on it, at 12.35:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.080) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.69:1 |
| White text | 12.35:1 |
Values
| HEX | #21335E |
| RGB | rgb(33, 51, 94) |
| HSL | hsl(222, 48%, 25%) |
| OKLCH | oklch(33% 0.08 265.2) |
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 #21335E | 12.35:1 | AAA | Lc -101.4 | Preferred for body text |
| Black text on #21335E | 1.69:1 | Fails | Lc 0.0 | Not readable |
| #21335E text on white | 12.35:1 | AAA | Lc 98.0 | Preferred for body text |
| #21335E text on black | 1.69:1 | 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 900.
-
Step 50
50
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E4EAF6
oklch(93.6% 0.017 264.5)
-
Step 200
200
#CFD9F0
oklch(88.5% 0.033 266.9)
-
Step 300
300
#AEC1E8
oklch(81% 0.059 264.6)
-
Step 400
400
#84A0DD
oklch(70.8% 0.095 265.1)
-
Step 500
500
#6587D3
oklch(63.1% 0.121 264.9)
-
Step 600
600
#4D6FC1
oklch(55.6% 0.133 265.4)
-
Step 700
700
#3E5CA6
oklch(49% 0.124 265.5)
-
Step 800
800
#334C87
oklch(42.7% 0.103 265.1)
-
Step 900
900 (this color)
#21335E
oklch(33% 0.08 265.2)
-
Step 950
950
#1A263F
oklch(27.1% 0.05 263.9)
#21335E 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) | #203860 | 0.015 |
| Deuteranopia (no green cones) | #17325D | 0.013 |
| Tritanopia (no blue cones) | #003D44 | 0.069 |
| Achromatopsia (no color) | #353535 | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21335E
#21335E
oklch(33% 0.08 265.2)
- #453200
#453200
oklch(33% 0.068 85.3)
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 #21335E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.016
- Marine Blue #01386A ΔE 0.031
- Marine #042E60 ΔE 0.033
- Dark Blue Grey #1F3B4D ΔE 0.044
- Space Cadet #2B2D42 ΔE 0.051
- Midnight Green #073B4C ΔE 0.051
- Gunmetal #293241 ΔE 0.052
- Twilight Blue #0A437A ΔE 0.062
Use #21335E 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.