#234577
Closest named color: Twilight Blue (#0A437A). oklch(39.2% 0.094 258), rgb(35, 69, 119).
Aa
White text reads best on this color (9.59:1).
About this color
#234577 is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.094 and its hue 258°. 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 9.59:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.094) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.18:1 |
| White text | 9.59:1 |
Values
| HEX | #234577 |
| RGB | rgb(35, 69, 119) |
| HSL | hsl(216, 55%, 30%) |
| OKLCH | oklch(39.2% 0.094 258) |
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 #234577 | 9.59:1 | AAA | Lc -96.2 | Preferred for body text |
| Black text on #234577 | 2.18:1 | Fails | Lc 12.0 | Not readable |
| #234577 text on white | 9.59:1 | AAA | Lc 92.0 | Preferred for body text |
| #234577 text on black | 2.18:1 | Fails | Lc -10.4 | 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
#CADAF4
oklch(88.4% 0.04 260.1)
-
Step 300
300
#A5C3EF
oklch(81% 0.071 257.9)
-
Step 400
400
#74A2E6
oklch(70.7% 0.112 258)
-
Step 500
500
#4F89DF
oklch(63.1% 0.144 258.1)
-
Step 600
600
#3171CD
oklch(55.6% 0.157 258)
-
Step 700
700
#245EB1
oklch(49.1% 0.145 258.1)
-
Step 800
800
#1F4D90
oklch(42.7% 0.122 258.2)
-
Step 900
900 (this color)
#234577
oklch(39.2% 0.094 258)
-
Step 950
950
#132643
oklch(26.9% 0.06 258.6)
#234577 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) | #2E4979 | 0.019 |
| Deuteranopia (no green cones) | #214176 | 0.012 |
| Tritanopia (no blue cones) | #005158 | 0.076 |
| Achromatopsia (no color) | #454545 | 0.094 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #234577
#234577
oklch(39.2% 0.094 258)
- #5D3F00
#5D3F00
oklch(39.2% 0.082 78.3)
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 #234577, 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 0.035
- Cobalt #1E488F ΔE 0.040
- Deep Sea Blue #015482 ΔE 0.045
- Dark Grey Blue #29465B ΔE 0.049
- Dusk Blue #26538D ΔE 0.052
- Marine Blue #01386A ΔE 0.054
- Charcoal #264653 ΔE 0.063
Use #234577 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.