#39518E
Closest named color: Dusk Blue (#26538D). oklch(44.7% 0.104 266.1), rgb(57, 81, 142).
Aa
White text reads best on this color (7.65:1).
About this color
#39518E is a dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.104 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.020 away. White text reads best on it, at 7.65:1.
| Hue family | Blues |
| Lightness | dark (45%) |
| Chroma | moderately saturated (0.104) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.74:1 |
| White text | 7.65:1 |
Values
| HEX | #39518E |
| RGB | rgb(57, 81, 142) |
| HSL | hsl(223, 43%, 39%) |
| OKLCH | oklch(44.7% 0.104 266.1) |
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 #39518E | 7.65:1 | AAA | Lc -91.2 | Preferred for body text |
| Black text on #39518E | 2.74:1 | Fails | Lc 17.6 | Dividers and decoration only |
| #39518E text on white | 7.65:1 | AAA | Lc 86.4 | Fine for body text |
| #39518E text on black | 2.74:1 | Fails | Lc -15.6 | Dividers and decoration only |
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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E4EAF6
oklch(93.6% 0.017 264.5)
-
Step 200
200
#CFD9F0
oklch(88.5% 0.033 266.9)
-
Step 300
300
#AEC0E9
oklch(80.8% 0.061 266.4)
-
Step 400
400
#849FDE
oklch(70.7% 0.098 266.1)
-
Step 500
500
#6686D5
oklch(63.1% 0.125 266.2)
-
Step 600
600
#4E6EC2
oklch(55.5% 0.136 266.4)
-
Step 700
700
#3F5CA8
oklch(49.2% 0.126 266.2)
-
Step 800
800 (this color)
#39518E
oklch(44.7% 0.104 266.1)
-
Step 900
900
#2D3F6D
oklch(37.6% 0.082 266.4)
-
Step 950
950
#1B2540
oklch(27% 0.052 267.5)
#39518E 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) | #365790 | 0.017 |
| Deuteranopia (no green cones) | #2B508D | 0.016 |
| Tritanopia (no blue cones) | #005F68 | 0.094 |
| Achromatopsia (no color) | #535353 | 0.105 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #39518E
#39518E
oklch(44.7% 0.104 266.1)
- #6B5000
#6B5000
oklch(44.7% 0.092 86.1)
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 #39518E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.020
- Twilight #4E518B ΔE 0.029
- Denim Blue #3B5B92 ΔE 0.029
- Light Navy Blue #2E5A88 ΔE 0.031
- Dusk #4E5481 ΔE 0.038
- Light Navy #155084 ΔE 0.038
- Cobalt #1E488F ΔE 0.041
- Dusky Blue #475F94 ΔE 0.046
Use #39518E 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.