#234D9E
Closest named color: Cobalt (#1E488F). oklch(43.9% 0.14 261.8), rgb(35, 77, 158).
Aa
White text reads best on this color (7.99:1).
About this color
#234D9E is a dark, vivid blue. In OKLCH its lightness is 44%, its chroma 0.140 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.028 away. White text reads best on it, at 7.99:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | vivid (0.140) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.62:1 |
| White text | 7.99:1 |
Values
| HEX | #234D9E |
| RGB | rgb(35, 77, 158) |
| HSL | hsl(220, 64%, 38%) |
| OKLCH | oklch(43.9% 0.14 261.8) |
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 #234D9E | 7.99:1 | AAA | Lc -92.0 | Preferred for body text |
| Black text on #234D9E | 2.62:1 | Fails | Lc 16.7 | Dividers and decoration only |
| #234D9E text on white | 7.99:1 | AAA | Lc 87.3 | Fine for body text |
| #234D9E text on black | 2.62:1 | Fails | Lc -14.8 | 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 800.
-
Step 50
50
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E1EAFA
oklch(93.5% 0.024 262.1)
-
Step 200
200
#C9DAF8
oklch(88.5% 0.045 261.9)
-
Step 300
300
#A4C1F6
oklch(80.8% 0.082 262.3)
-
Step 400
400
#739FF2
oklch(70.6% 0.131 262.3)
-
Step 500
500
#4E85ED
oklch(63.1% 0.167 261.8)
-
Step 600
600
#326CDC
oklch(55.6% 0.182 261.8)
-
Step 700
700
#2559BF
oklch(49.1% 0.17 262)
-
Step 800
800 (this color)
#234D9E
oklch(43.9% 0.14 261.8)
-
Step 900
900
#1F3E7B
oklch(37.6% 0.11 262.2)
-
Step 950
950
#132548
oklch(27% 0.069 262.3)
#234D9E 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) | #1A57A1 | 0.027 |
| Deuteranopia (no green cones) | #004B9C | 0.021 |
| Tritanopia (no blue cones) | #00606E | 0.108 |
| Achromatopsia (no color) | #515151 | 0.140 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #234D9E
#234D9E
oklch(43.9% 0.14 261.8)
- #6B4C00
#6B4C00
oklch(43.9% 0.09 81.6)
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 #234D9E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.028
- Dusk Blue #26538D ΔE 0.035
- Light Navy #155084 ΔE 0.047
- Blueberry #464196 ΔE 0.049
- Denim Blue #3B5B92 ΔE 0.055
- Deep Sea Blue #015482 ΔE 0.056
- Sapphire #2138AB ΔE 0.057
- Light Navy Blue #2E5A88 ΔE 0.058
Use #234D9E 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.