#234B8D
Closest named color: Cobalt (#1E488F). oklch(42.1% 0.119 259.9), rgb(35, 75, 141).
Aa
White text reads best on this color (8.52:1).
About this color
#234B8D is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.119 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.011 away. White text reads best on it, at 8.52:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.119) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.46:1 |
| White text | 8.52:1 |
Values
| HEX | #234B8D |
| RGB | rgb(35, 75, 141) |
| HSL | hsl(217, 60%, 35%) |
| OKLCH | oklch(42.1% 0.119 259.9) |
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 #234B8D | 8.52:1 | AAA | Lc -93.6 | Preferred for body text |
| Black text on #234B8D | 2.46:1 | Fails | Lc 15.0 | Not readable |
| #234B8D text on white | 8.52:1 | AAA | Lc 89.0 | Fine for body text |
| #234B8D text on black | 2.46:1 | Fails | Lc -13.2 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EAF8
oklch(93.5% 0.021 261.8)
-
Step 200
200
#CBDAF3
oklch(88.5% 0.038 260.7)
-
Step 300
300
#A7C2EE
oklch(80.9% 0.069 260.1)
-
Step 400
400
#77A1E6
oklch(70.7% 0.112 260)
-
Step 500
500
#5488DE
oklch(63.1% 0.142 259.9)
-
Step 600
600
#3970CC
oklch(55.6% 0.154 260.1)
-
Step 700
700
#2B5DB0
oklch(49% 0.143 260)
-
Step 800
800 (this color)
#234B8D
oklch(42.1% 0.119 259.9)
-
Step 900
900
#224072
oklch(37.6% 0.093 260)
-
Step 950
950
#152643
oklch(27% 0.059 260.5)
#234B8D 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) | #29528F | 0.022 |
| Deuteranopia (no green cones) | #12488C | 0.017 |
| Tritanopia (no blue cones) | #005B65 | 0.094 |
| Achromatopsia (no color) | #4C4C4C | 0.119 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #234B8D
#234B8D
oklch(42.1% 0.119 259.9)
- #664700
#664700
oklch(42.1% 0.087 80.1)
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 #234B8D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.011
- Dusk Blue #26538D ΔE 0.024
- Light Navy #155084 ΔE 0.024
- Deep Sea Blue #015482 ΔE 0.038
- Twilight Blue #0A437A ΔE 0.044
- Light Navy Blue #2E5A88 ΔE 0.049
- Blueberry #464196 ΔE 0.051
- Dark Slate Blue #483D8B ΔE 0.056
Use #234B8D 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.