#21346B
Closest named color: Marine Blue (#01386A). oklch(34.2% 0.099 266.8), rgb(33, 52, 107).
Aa
White text reads best on this color (11.87:1).
About this color
#21346B 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 0.025 away. White text reads best on it, at 11.87:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.099) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.76:1 |
| White text | 11.87:1 |
Values
| HEX | #21346B |
| RGB | rgb(33, 52, 107) |
| HSL | hsl(225, 53%, 27%) |
| OKLCH | oklch(34.2% 0.099 266.8) |
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 #21346B | 11.87:1 | AAA | Lc -100.6 | Preferred for body text |
| Black text on #21346B | 1.76:1 | Fails | Lc 0.0 | Not readable |
| #21346B text on white | 11.87:1 | AAA | Lc 97.0 | Preferred for body text |
| #21346B text on black | 1.76:1 | 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
#ABC0F2
oklch(80.9% 0.075 267)
-
Step 400
400
#7F9EEB
oklch(70.8% 0.119 266.7)
-
Step 500
500
#6083E5
oklch(63.1% 0.153 267.2)
-
Step 600
600
#476BD3
oklch(55.7% 0.165 266.7)
-
Step 700
700
#3958B6
oklch(49% 0.153 266.9)
-
Step 800
800
#2F4994
oklch(42.8% 0.127 266.6)
-
Step 900
900 (this color)
#21346B
oklch(34.2% 0.099 266.8)
-
Step 950
950
#182545
oklch(27.1% 0.062 265.8)
#21346B 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) | #173B6D | 0.021 |
| Deuteranopia (no green cones) | #05346A | 0.024 |
| Tritanopia (no blue cones) | #00414A | 0.083 |
| Achromatopsia (no color) | #373737 | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21346B
#21346B
oklch(34.2% 0.099 266.8)
- #483500
#483500
oklch(34.1% 0.07 86.3)
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 #21346B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.025
- Prussian Blue #1D3557 ΔE 0.037
- Marine #042E60 ΔE 0.039
- Twilight Blue #0A437A ΔE 0.048
- Dark Blue Grey #1F3B4D ΔE 0.062
- Midnight Green #073B4C ΔE 0.068
- Dark Grey Blue #29465B ΔE 0.070
- Midnight Blue #191970 ΔE 0.071
Use #21346B 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.