#234A87
Closest named color: Cobalt (#1E488F). oklch(41.5% 0.111 259.1), rgb(35, 74, 135).
Aa
White text reads best on this color (8.74:1).
About this color
#234A87 is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.111 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.016 away. White text reads best on it, at 8.74:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.111) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.40:1 |
| White text | 8.74:1 |
Values
| HEX | #234A87 |
| RGB | rgb(35, 74, 135) |
| HSL | hsl(217, 59%, 33%) |
| OKLCH | oklch(41.5% 0.111 259.1) |
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 #234A87 | 8.74:1 | AAA | Lc -94.2 | Preferred for body text |
| Black text on #234A87 | 2.40:1 | Fails | Lc 14.3 | Not readable |
| #234A87 text on white | 8.74:1 | AAA | Lc 89.7 | Fine for body text |
| #234A87 text on black | 2.40:1 | Fails | Lc -12.6 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E2EAF7
oklch(93.5% 0.02 260.2)
-
Step 200
200
#CBDAF2
oklch(88.5% 0.037 259.8)
-
Step 300
300
#A8C2EB
oklch(80.9% 0.065 259.4)
-
Step 400
400
#79A2E1
oklch(70.8% 0.103 258.8)
-
Step 500
500
#5689D9
oklch(63.1% 0.133 259.1)
-
Step 600
600
#3B71C6
oklch(55.5% 0.144 259.2)
-
Step 700
700
#2D5EAB
oklch(49% 0.134 259.2)
-
Step 800
800 (this color)
#234A87
oklch(41.5% 0.111 259.1)
-
Step 900
900
#24416F
oklch(37.7% 0.087 259.3)
-
Step 950
950
#152641
oklch(26.9% 0.056 259.3)
#234A87 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) | #2C5089 | 0.021 |
| Deuteranopia (no green cones) | #194786 | 0.013 |
| Tritanopia (no blue cones) | #005862 | 0.087 |
| Achromatopsia (no color) | #4B4B4B | 0.111 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #234A87
#234A87
oklch(41.5% 0.111 259.1)
- #644500
#644500
oklch(41.4% 0.086 79.4)
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 #234A87, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.016
- Light Navy #155084 ΔE 0.020
- Dusk Blue #26538D ΔE 0.027
- Deep Sea Blue #015482 ΔE 0.035
- Twilight Blue #0A437A ΔE 0.036
- Light Navy Blue #2E5A88 ΔE 0.050
- Blueberry #464196 ΔE 0.055
- Dark Slate Blue #483D8B ΔE 0.057
Use #234A87 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.