#213C68
Closest named color: Marine Blue (#01386A). oklch(35.9% 0.083 259.7), rgb(33, 60, 104).
Aa
White text reads best on this color (10.98:1).
About this color
#213C68 is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.083 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.029 away. White text reads best on it, at 10.98:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.083) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.91:1 |
| White text | 10.98:1 |
Values
| HEX | #213C68 |
| RGB | rgb(33, 60, 104) |
| HSL | hsl(217, 52%, 27%) |
| OKLCH | oklch(35.9% 0.083 259.7) |
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 #213C68 | 10.98:1 | AAA | Lc -99.1 | Preferred for body text |
| Black text on #213C68 | 1.91:1 | Fails | Lc 8.7 | Not readable |
| #213C68 text on white | 10.98:1 | AAA | Lc 95.2 | Preferred for body text |
| #213C68 text on black | 1.91:1 | Fails | Lc -7.4 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EAF6
oklch(93.5% 0.018 261.3)
-
Step 200
200
#CCDAF1
oklch(88.5% 0.035 260.4)
-
Step 300
300
#A9C2EA
oklch(80.9% 0.063 259.7)
-
Step 400
400
#7BA2DF
oklch(70.8% 0.1 259.1)
-
Step 500
500
#5989D6
oklch(63.1% 0.128 259.5)
-
Step 600
600
#3F71C4
oklch(55.6% 0.14 260)
-
Step 700
700
#315FA9
oklch(49.2% 0.129 259.5)
-
Step 800
800
#294E89
oklch(42.8% 0.107 259.4)
-
Step 900
900 (this color)
#213C68
oklch(35.9% 0.083 259.7)
-
Step 950
950
#162640
oklch(26.9% 0.053 259.7)
#213C68 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) | #28406A | 0.016 |
| Deuteranopia (no green cones) | #1E3967 | 0.010 |
| Tritanopia (no blue cones) | #00464D | 0.068 |
| Achromatopsia (no color) | #3C3C3C | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #213C68
#213C68
oklch(35.9% 0.083 259.7)
- #513700
#513700
oklch(35.8% 0.074 79.2)
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 #213C68, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.029
- Prussian Blue #1D3557 ΔE 0.035
- Twilight Blue #0A437A ΔE 0.035
- Dark Grey Blue #29465B ΔE 0.045
- Dark Blue Grey #1F3B4D ΔE 0.048
- Marine #042E60 ΔE 0.055
- Charcoal #264653 ΔE 0.055
- Midnight Green #073B4C ΔE 0.056
Use #213C68 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.