#23518B
Closest named color: Dusk Blue (#26538D). oklch(43.4% 0.108 255.6), rgb(35, 81, 139).
Aa
White text reads best on this color (8.01:1).
About this color
#23518B is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.108 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.007 away. White text reads best on it, at 8.01:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.108) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.62:1 |
| White text | 8.01:1 |
Values
| HEX | #23518B |
| RGB | rgb(35, 81, 139) |
| HSL | hsl(213, 60%, 34%) |
| OKLCH | oklch(43.4% 0.108 255.6) |
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 #23518B | 8.01:1 | AAA | Lc -92.2 | Preferred for body text |
| Black text on #23518B | 2.62:1 | Fails | Lc 16.5 | Dividers and decoration only |
| #23518B text on white | 8.01:1 | AAA | Lc 87.5 | Fine for body text |
| #23518B text on black | 2.62:1 | Fails | Lc -14.7 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E2EBF6
oklch(93.7% 0.018 253.3)
-
Step 200
200
#CADBF1
oklch(88.6% 0.035 254.9)
-
Step 300
300
#A6C3EA
oklch(80.9% 0.064 255.9)
-
Step 400
400
#76A3DF
oklch(70.7% 0.101 255.9)
-
Step 500
500
#518BD6
oklch(63.1% 0.129 255.6)
-
Step 600
600
#3473C4
oklch(55.6% 0.142 256)
-
Step 700
700
#2660A9
oklch(49% 0.131 255.9)
-
Step 800
800 (this color)
#23518B
oklch(43.4% 0.108 255.6)
-
Step 900
900
#20426D
oklch(37.6% 0.084 255.3)
-
Step 950
950
#142740
oklch(27% 0.053 255.8)
#23518B 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) | #36568D | 0.026 |
| Deuteranopia (no green cones) | #254C8A | 0.014 |
| Tritanopia (no blue cones) | #005F67 | 0.085 |
| Achromatopsia (no color) | #505050 | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #23518B
#23518B
oklch(43.4% 0.108 255.6)
- #6D4800
#6D4800
oklch(43.3% 0.091 75.4)
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 #23518B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.007
- Light Navy #155084 ΔE 0.016
- Deep Sea Blue #015482 ΔE 0.026
- Cobalt #1E488F ΔE 0.029
- Light Navy Blue #2E5A88 ΔE 0.032
- Denim Blue #3B5B92 ΔE 0.042
- Twilight #4E518B ΔE 0.052
- Twilight Blue #0A437A ΔE 0.053
Use #23518B 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.