#21336A
Closest named color: Marine Blue (#01386A). oklch(33.9% 0.099 267.3), rgb(33, 51, 106).
Aa
White text reads best on this color (12.02:1).
About this color
#21336A is a dark, moderately saturated blue. In OKLCH its lightness is 34%, its chroma 0.099 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.026 away. White text reads best on it, at 12.02:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.099) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.74:1 |
| White text | 12.02:1 |
Values
| HEX | #21336A |
| RGB | rgb(33, 51, 106) |
| HSL | hsl(225, 53%, 27%) |
| OKLCH | oklch(33.9% 0.099 267.3) |
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 #21336A | 12.02:1 | AAA | Lc -100.8 | Preferred for body text |
| Black text on #21336A | 1.74:1 | Fails | Lc 0.0 | Not readable |
| #21336A text on white | 12.02:1 | AAA | Lc 97.3 | Preferred for body text |
| #21336A text on black | 1.74:1 | 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
#F2F5FC
oklch(97% 0.01 267.4)
-
Step 100
100
#E3EAF9
oklch(93.6% 0.022 265.8)
-
Step 200
200
#CDD9F5
oklch(88.5% 0.041 267.1)
-
Step 300
300
#ABC0F1
oklch(80.9% 0.073 266.7)
-
Step 400
400
#809EEB
oklch(70.8% 0.118 267.2)
-
Step 500
500
#6183E4
oklch(63% 0.151 267.4)
-
Step 600
600
#496AD2
oklch(55.5% 0.164 267.6)
-
Step 700
700
#3A58B6
oklch(49% 0.153 267.2)
-
Step 800
800
#304993
oklch(42.7% 0.125 267)
-
Step 900
900 (this color)
#21336A
oklch(33.9% 0.099 267.3)
-
Step 950
950
#192445
oklch(26.9% 0.063 268.1)
#21336A 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) | #153A6C | 0.022 |
| Deuteranopia (no green cones) | #043369 | 0.025 |
| Tritanopia (no blue cones) | #004049 | 0.083 |
| Achromatopsia (no color) | #363636 | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21336A
#21336A
oklch(33.9% 0.099 267.3)
- #473500
#473500
oklch(34% 0.069 87.5)
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 #21336A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.026
- Prussian Blue #1D3557 ΔE 0.036
- Marine #042E60 ΔE 0.037
- Twilight Blue #0A437A ΔE 0.051
- Dark Blue Grey #1F3B4D ΔE 0.062
- Midnight Green #073B4C ΔE 0.068
- Midnight Blue #191970 ΔE 0.069
- Space Cadet #2B2D42 ΔE 0.071
Use #21336A 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.