#213A8E
Closest named color: Cobalt (#1E488F). oklch(38.4% 0.143 266.8), rgb(33, 58, 142).
Aa
White text reads best on this color (10.19:1).
About this color
#213A8E is a dark, vivid blue. In OKLCH its lightness is 38%, its chroma 0.143 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.037 away. White text reads best on it, at 10.19:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | vivid (0.143) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.06:1 |
| White text | 10.19:1 |
Values
| HEX | #213A8E |
| RGB | rgb(33, 58, 142) |
| HSL | hsl(226, 62%, 34%) |
| OKLCH | oklch(38.4% 0.143 266.8) |
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 #213A8E | 10.19:1 | AAA | Lc -97.3 | Preferred for body text |
| Black text on #213A8E | 2.06:1 | Fails | Lc 10.8 | Not readable |
| #213A8E text on white | 10.19:1 | AAA | Lc 93.2 | Preferred for body text |
| #213A8E text on black | 2.06:1 | Fails | Lc -9.3 | 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
#F1F5FF
oklch(97% 0.014 268.5)
-
Step 100
100
#E1EAFF
oklch(93.7% 0.03 267.2)
-
Step 200
200
#C8D9FF
oklch(88.5% 0.056 266.2)
-
Step 300
300
#A5BFFF
oklch(80.9% 0.095 267.2)
-
Step 400
400
#759BFF
oklch(70.6% 0.153 266.8)
-
Step 500
500
#537EFF
oklch(63.1% 0.197 266.8)
-
Step 600
600
#355EFB
oklch(55.6% 0.237 266.7)
-
Step 700
700
#294CDB
oklch(49.1% 0.221 266.7)
-
Step 800
800
#2240B1
oklch(42.8% 0.183 266.6)
-
Step 900
900 (this color)
#213A8E
oklch(38.4% 0.143 266.8)
-
Step 950
950
#122252
oklch(27.1% 0.09 266.4)
#213A8E 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) | #004691 | 0.033 |
| Deuteranopia (no green cones) | #003C8C | 0.021 |
| Tritanopia (no blue cones) | #004F5E | 0.113 |
| Achromatopsia (no color) | #414141 | 0.143 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #213A8E
#213A8E
oklch(38.4% 0.143 266.8)
- #554000
#554000
oklch(38.4% 0.078 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 #213A8E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.037
- Twilight Blue #0A437A ΔE 0.046
- Sapphire #2138AB ΔE 0.048
- Dark Slate Blue #483D8B ΔE 0.057
- Blueberry #464196 ΔE 0.058
- Light Navy #155084 ΔE 0.065
- Marine Blue #01386A ΔE 0.068
- Dusk Blue #26538D ΔE 0.071
Use #213A8E 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.