#213F95
Closest named color: Cobalt (#1E488F). oklch(40% 0.146 265.5), rgb(33, 63, 149).
Aa
White text reads best on this color (9.50:1).
About this color
#213F95 is a dark, vivid blue. In OKLCH its lightness is 40%, its chroma 0.146 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.027 away. White text reads best on it, at 9.50:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | vivid (0.146) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.20:1 |
| White text | 9.50:1 |
Values
| HEX | #213F95 |
| RGB | rgb(33, 63, 149) |
| HSL | hsl(224, 64%, 36%) |
| OKLCH | oklch(40% 0.146 265.5) |
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 #213F95 | 9.50:1 | AAA | Lc -95.8 | Preferred for body text |
| Black text on #213F95 | 2.20:1 | Fails | Lc 12.5 | Not readable |
| #213F95 text on white | 9.50:1 | AAA | Lc 91.5 | Preferred for body text |
| #213F95 text on black | 2.20:1 | Fails | Lc -10.9 | 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
#F1F6FF
oklch(97.2% 0.013 262.4)
-
Step 100
100
#E0EAFF
oklch(93.6% 0.03 265.3)
-
Step 200
200
#C8D9FF
oklch(88.5% 0.056 266.2)
-
Step 300
300
#A3C0FF
oklch(80.9% 0.095 265.2)
-
Step 400
400
#739CFF
oklch(70.7% 0.152 265.7)
-
Step 500
500
#4F7FFF
oklch(63.1% 0.197 265.6)
-
Step 600
600
#2D5EFE
oklch(55.6% 0.243 265.5)
-
Step 700
700
#224CDE
oklch(49.2% 0.226 265.5)
-
Step 800
800
#1D3FB3
oklch(42.6% 0.188 265.7)
-
Step 900
900 (this color)
#213F95
oklch(40% 0.146 265.5)
-
Step 950
950
#102253
oklch(27% 0.093 265.4)
#213F95 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) | #004B98 | 0.033 |
| Deuteranopia (no green cones) | #004093 | 0.020 |
| Tritanopia (no blue cones) | #005463 | 0.115 |
| Achromatopsia (no color) | #464646 | 0.146 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #213F95
#213F95
oklch(40% 0.146 265.5)
- #5C4400
#5C4400
oklch(40.2% 0.082 85.6)
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 #213F95, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.027
- Sapphire #2138AB ΔE 0.039
- Blueberry #464196 ΔE 0.050
- Twilight Blue #0A437A ΔE 0.051
- Dark Slate Blue #483D8B ΔE 0.054
- Light Navy #155084 ΔE 0.058
- Dusk Blue #26538D ΔE 0.060
- Deep Sea Blue #015482 ΔE 0.071
Use #213F95 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.