#213C6A
Closest named color: Marine Blue (#01386A). oklch(36% 0.087 260.4), rgb(33, 60, 106).
Aa
White text reads best on this color (10.94:1).
About this color
#213C6A is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.087 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 10.94:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.087) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.91:1 |
| White text | 10.94:1 |
Values
| HEX | #213C6A |
| RGB | rgb(33, 60, 106) |
| HSL | hsl(218, 53%, 27%) |
| OKLCH | oklch(36% 0.087 260.4) |
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 #213C6A | 10.94:1 | AAA | Lc -99.0 | Preferred for body text |
| Black text on #213C6A | 1.91:1 | Fails | Lc 8.8 | Not readable |
| #213C6A text on white | 10.94:1 | AAA | Lc 95.1 | Preferred for body text |
| #213C6A text on black | 1.91:1 | Fails | Lc -7.5 | 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
#E3EAF7
oklch(93.6% 0.019 263)
-
Step 200
200
#CCDAF2
oklch(88.5% 0.036 261.3)
-
Step 300
300
#A9C2EB
oklch(80.9% 0.064 260.3)
-
Step 400
400
#7BA1E1
oklch(70.7% 0.103 260.5)
-
Step 500
500
#5988D9
oklch(63% 0.133 260.7)
-
Step 600
600
#3E71C6
oklch(55.6% 0.143 260)
-
Step 700
700
#305EAC
oklch(49.1% 0.135 260.3)
-
Step 800
800
#294D8B
oklch(42.7% 0.111 260.5)
-
Step 900
900 (this color)
#213C6A
oklch(36% 0.087 260.4)
-
Step 950
950
#162641
oklch(27% 0.055 260.3)
#213C6A 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) | #27406C | 0.015 |
| Deuteranopia (no green cones) | #1C3969 | 0.011 |
| Tritanopia (no blue cones) | #00474D | 0.073 |
| Achromatopsia (no color) | #3D3D3D | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #213C6A
#213C6A
oklch(36% 0.087 260.4)
- #513800
#513800
oklch(36% 0.074 80.6)
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 #213C6A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.029
- Twilight Blue #0A437A ΔE 0.033
- Prussian Blue #1D3557 ΔE 0.038
- Dark Grey Blue #29465B ΔE 0.047
- Dark Blue Grey #1F3B4D ΔE 0.051
- Marine #042E60 ΔE 0.055
- Charcoal #264653 ΔE 0.058
- Midnight Green #073B4C ΔE 0.059
Use #213C6A 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.