#234D9A
Closest named color: Cobalt (#1E488F). oklch(43.5% 0.135 261.3), rgb(35, 77, 154).
Aa
White text reads best on this color (8.07:1).
About this color
#234D9A is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.135 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.023 away. White text reads best on it, at 8.07:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.135) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.59:1 |
| White text | 8.07:1 |
Values
| HEX | #234D9A |
| RGB | rgb(35, 77, 154) |
| HSL | hsl(219, 63%, 37%) |
| OKLCH | oklch(43.5% 0.135 261.3) |
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 #234D9A | 8.07:1 | AAA | Lc -92.3 | Preferred for body text |
| Black text on #234D9A | 2.59:1 | Fails | Lc 16.4 | Dividers and decoration only |
| #234D9A text on white | 8.07:1 | AAA | Lc 87.6 | Fine for body text |
| #234D9A text on black | 2.59:1 | Fails | Lc -14.6 | 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
#C9DAF7
oklch(88.5% 0.044 261.2)
-
Step 300
300
#A4C2F4
oklch(81% 0.078 260.5)
-
Step 400
400
#74A0EF
oklch(70.7% 0.126 261.5)
-
Step 500
500
#4F86E9
oklch(63.1% 0.16 261.2)
-
Step 600
600
#336DD8
oklch(55.6% 0.175 261.3)
-
Step 700
700
#265BBB
oklch(49.2% 0.162 261.1)
-
Step 800
800 (this color)
#234D9A
oklch(43.5% 0.135 261.3)
-
Step 900
900
#203F78
oklch(37.7% 0.104 261.4)
-
Step 950
950
#132546
oklch(26.9% 0.066 261.5)
#234D9A 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) | #20569D | 0.025 |
| Deuteranopia (no green cones) | #004B98 | 0.021 |
| Tritanopia (no blue cones) | #005F6C | 0.104 |
| Achromatopsia (no color) | #505050 | 0.135 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #234D9A
#234D9A
oklch(43.5% 0.135 261.3)
- #6A4B00
#6A4B00
oklch(43.5% 0.09 81.3)
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 #234D9A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.023
- Dusk Blue #26538D ΔE 0.030
- Light Navy #155084 ΔE 0.040
- Blueberry #464196 ΔE 0.048
- Deep Sea Blue #015482 ΔE 0.051
- Denim Blue #3B5B92 ΔE 0.053
- Light Navy Blue #2E5A88 ΔE 0.054
- Twilight #4E518B ΔE 0.060
Use #234D9A 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.