#234088
Closest named color: Cobalt (#1E488F). oklch(39.3% 0.125 264.7), rgb(35, 64, 136).
Aa
White text reads best on this color (9.72:1).
About this color
#234088 is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.125 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.024 away. White text reads best on it, at 9.72:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.125) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.16:1 |
| White text | 9.72:1 |
Values
| HEX | #234088 |
| RGB | rgb(35, 64, 136) |
| HSL | hsl(223, 59%, 34%) |
| OKLCH | oklch(39.3% 0.125 264.7) |
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 #234088 | 9.72:1 | AAA | Lc -96.4 | Preferred for body text |
| Black text on #234088 | 2.16:1 | Fails | Lc 11.8 | Not readable |
| #234088 text on white | 9.72:1 | AAA | Lc 92.2 | Preferred for body text |
| #234088 text on black | 2.16:1 | Fails | Lc -10.3 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E1EAFD
oklch(93.6% 0.028 265.4)
-
Step 200
200
#C8D9FD
oklch(88.4% 0.053 265.3)
-
Step 300
300
#A3C0FE
oklch(80.9% 0.094 265)
-
Step 400
400
#719DFE
oklch(70.7% 0.15 264.4)
-
Step 500
500
#4E80FC
oklch(63% 0.193 264.9)
-
Step 600
600
#3366EB
oklch(55.6% 0.209 264.5)
-
Step 700
700
#2753CD
oklch(49.1% 0.195 264.8)
-
Step 800
800
#2145A5
oklch(42.6% 0.161 264.7)
-
Step 900
900 (this color)
#234088
oklch(39.3% 0.125 264.7)
-
Step 950
950
#12244D
oklch(27.1% 0.079 264)
#234088 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) | #12498B | 0.026 |
| Deuteranopia (no green cones) | #004087 | 0.023 |
| Tritanopia (no blue cones) | #00515D | 0.101 |
| Achromatopsia (no color) | #444444 | 0.126 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #234088
#234088
oklch(39.3% 0.125 264.7)
- #5A4100
#5A4100
oklch(39.2% 0.081 83.7)
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 #234088, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.024
- Twilight Blue #0A437A ΔE 0.032
- Light Navy #155084 ΔE 0.047
- Dark Slate Blue #483D8B ΔE 0.051
- Blueberry #464196 ΔE 0.053
- Dusk Blue #26538D ΔE 0.055
- Deep Sea Blue #015482 ΔE 0.061
- Sapphire #2138AB ΔE 0.061
Use #234088 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.