#234F8E
Closest named color: Dusk Blue (#26538D). oklch(43.1% 0.115 257.8), rgb(35, 79, 142).
Aa
White text reads best on this color (8.13:1).
About this color
#234F8E is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.115 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.013 away. White text reads best on it, at 8.13:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.115) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.58:1 |
| White text | 8.13:1 |
Values
| HEX | #234F8E |
| RGB | rgb(35, 79, 142) |
| HSL | hsl(215, 60%, 35%) |
| OKLCH | oklch(43.1% 0.115 257.8) |
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 #234F8E | 8.13:1 | AAA | Lc -92.5 | Preferred for body text |
| Black text on #234F8E | 2.58:1 | Fails | Lc 16.2 | Dividers and decoration only |
| #234F8E text on white | 8.13:1 | AAA | Lc 87.8 | Fine for body text |
| #234F8E text on black | 2.58:1 | Fails | Lc -14.3 | 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 800.
-
Step 50
50
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EBF7
oklch(93.7% 0.019 255.5)
-
Step 200
200
#CADAF2
oklch(88.4% 0.037 258.4)
-
Step 300
300
#A6C3EC
oklch(81% 0.066 257)
-
Step 400
400
#76A2E3
oklch(70.7% 0.107 258)
-
Step 500
500
#5189DB
oklch(63% 0.138 257.9)
-
Step 600
600
#3572C9
oklch(55.7% 0.149 257.7)
-
Step 700
700
#275FAE
oklch(49.2% 0.139 257.7)
-
Step 800
800 (this color)
#234F8E
oklch(43.1% 0.115 257.8)
-
Step 900
900
#214170
oklch(37.6% 0.089 258)
-
Step 950
950
#142642
oklch(26.9% 0.058 258.9)
#234F8E 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) | #305590 | 0.023 |
| Deuteranopia (no green cones) | #1C4B8D | 0.014 |
| Tritanopia (no blue cones) | #005E67 | 0.091 |
| Achromatopsia (no color) | #4F4F4F | 0.115 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #234F8E
#234F8E
oklch(43.1% 0.115 257.8)
- #6B4900
#6B4900
oklch(43.2% 0.09 78.2)
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 #234F8E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.013
- Light Navy #155084 ΔE 0.021
- Cobalt #1E488F ΔE 0.022
- Deep Sea Blue #015482 ΔE 0.032
- Light Navy Blue #2E5A88 ΔE 0.039
- Denim Blue #3B5B92 ΔE 0.046
- Twilight Blue #0A437A ΔE 0.052
- Twilight #4E518B ΔE 0.053
Use #234F8E 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.