#234374
Closest named color: Twilight Blue (#0A437A). oklch(38.5% 0.092 258.7), rgb(35, 67, 116).
Aa
White text reads best on this color (9.87:1).
About this color
#234374 is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.092 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.020 away. White text reads best on it, at 9.87:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.092) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.12:1 |
| White text | 9.87:1 |
Values
| HEX | #234374 |
| RGB | rgb(35, 67, 116) |
| HSL | hsl(216, 54%, 30%) |
| OKLCH | oklch(38.5% 0.092 258.7) |
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 #234374 | 9.87:1 | AAA | Lc -96.9 | Preferred for body text |
| Black text on #234374 | 2.12:1 | Fails | Lc 11.3 | Not readable |
| #234374 text on white | 9.87:1 | AAA | Lc 92.7 | Preferred for body text |
| #234374 text on black | 2.12:1 | Fails | Lc -9.8 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EBF8
oklch(93.7% 0.02 257.5)
-
Step 200
200
#CADAF3
oklch(88.4% 0.039 259.3)
-
Step 300
300
#A6C2EE
oklch(80.9% 0.07 259.3)
-
Step 400
400
#76A2E5
oklch(70.8% 0.11 258.6)
-
Step 500
500
#5289DE
oklch(63.2% 0.141 258.8)
-
Step 600
600
#3571CB
oklch(55.6% 0.153 258.5)
-
Step 700
700
#285EB0
oklch(49.1% 0.143 258.8)
-
Step 800
800
#224D8E
oklch(42.6% 0.118 258.6)
-
Step 900
900 (this color)
#234374
oklch(38.5% 0.092 258.7)
-
Step 950
950
#142643
oklch(27% 0.059 259.5)
#234374 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) | #2D4776 | 0.018 |
| Deuteranopia (no green cones) | #204073 | 0.010 |
| Tritanopia (no blue cones) | #004E56 | 0.073 |
| Achromatopsia (no color) | #434343 | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #234374
#234374
oklch(38.5% 0.092 258.7)
- #5A3D00
#5A3D00
oklch(38.3% 0.08 78.5)
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 #234374, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.020
- Light Navy #155084 ΔE 0.042
- Cobalt #1E488F ΔE 0.045
- Dark Grey Blue #29465B ΔE 0.047
- Marine Blue #01386A ΔE 0.048
- Deep Sea Blue #015482 ΔE 0.052
- Dusk Blue #26538D ΔE 0.059
- Charcoal #264653 ΔE 0.061
Use #234374 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.