#234287
Closest named color: Cobalt (#1E488F). oklch(39.6% 0.121 263.6), rgb(35, 66, 135).
Aa
White text reads best on this color (9.54:1).
About this color
#234287 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.121 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.020 away. White text reads best on it, at 9.54:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.121) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.20:1 |
| White text | 9.54:1 |
Values
| HEX | #234287 |
| RGB | rgb(35, 66, 135) |
| HSL | hsl(221, 59%, 33%) |
| OKLCH | oklch(39.6% 0.121 263.6) |
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 #234287 | 9.54:1 | AAA | Lc -96.0 | Preferred for body text |
| Black text on #234287 | 2.20:1 | Fails | Lc 12.2 | Not readable |
| #234287 text on white | 9.54:1 | AAA | Lc 91.7 | Preferred for body text |
| #234287 text on black | 2.20:1 | Fails | Lc -10.6 | 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 900.
-
Step 50
50
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E1EAFC
oklch(93.6% 0.026 264.4)
-
Step 200
200
#C8DAFC
oklch(88.6% 0.051 263.2)
-
Step 300
300
#A2C1FC
oklch(80.9% 0.091 263)
-
Step 400
400
#719EFB
oklch(70.8% 0.145 263.6)
-
Step 500
500
#4C82F8
oklch(63.1% 0.186 263.5)
-
Step 600
600
#3168E7
oklch(55.6% 0.202 263.5)
-
Step 700
700
#2455C9
oklch(49% 0.188 263.6)
-
Step 800
800
#1F47A3
oklch(42.8% 0.156 263.5)
-
Step 900
900 (this color)
#234287
oklch(39.6% 0.121 263.6)
-
Step 950
950
#12244B
oklch(26.9% 0.076 263.5)
#234287 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) | #1A4A8A | 0.022 |
| Deuteranopia (no green cones) | #004186 | 0.023 |
| Tritanopia (no blue cones) | #00525E | 0.096 |
| Achromatopsia (no color) | #454545 | 0.122 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #234287
#234287
oklch(39.6% 0.121 263.6)
- #5B4200
#5B4200
oklch(39.6% 0.081 84.1)
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 #234287, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.020
- Twilight Blue #0A437A ΔE 0.030
- Light Navy #155084 ΔE 0.041
- Dusk Blue #26538D ΔE 0.049
- Dark Slate Blue #483D8B ΔE 0.051
- Blueberry #464196 ΔE 0.053
- Deep Sea Blue #015482 ΔE 0.055
- Marine Blue #01386A ΔE 0.064
Use #234287 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.