#39457B
Closest named color: Cobalt (#1E488F). oklch(40.8% 0.092 272.3), rgb(57, 69, 123).
Aa
White text reads best on this color (9.08:1).
About this color
#39457B is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.092 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.042 away. White text reads best on it, at 9.08:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.092) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.31:1 |
| White text | 9.08:1 |
Values
| HEX | #39457B |
| RGB | rgb(57, 69, 123) |
| HSL | hsl(229, 37%, 35%) |
| OKLCH | oklch(40.8% 0.092 272.3) |
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 #39457B | 9.08:1 | AAA | Lc -95.2 | Preferred for body text |
| Black text on #39457B | 2.31:1 | Fails | Lc 13.2 | Not readable |
| #39457B text on white | 9.08:1 | AAA | Lc 90.8 | Preferred for body text |
| #39457B text on black | 2.31:1 | Fails | Lc -11.6 | 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
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E6E9F5
oklch(93.5% 0.016 274.8)
-
Step 200
200
#D2D8ED
oklch(88.4% 0.03 273.1)
-
Step 300
300
#B4BFE4
oklch(80.8% 0.054 272.1)
-
Step 400
400
#8E9ED7
oklch(70.8% 0.086 272)
-
Step 500
500
#7384CC
oklch(63% 0.11 272.8)
-
Step 600
600
#5C6DB9
oklch(55.6% 0.12 272.5)
-
Step 700
700
#4C5B9F
oklch(49.2% 0.11 272.4)
-
Step 800
800 (this color)
#39457B
oklch(40.8% 0.092 272.3)
-
Step 900
900
#353E67
oklch(37.6% 0.071 273.1)
-
Step 950
950
#1F253D
oklch(27.1% 0.046 272.4)
#39457B 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) | #2F4B7D | 0.020 |
| Deuteranopia (no green cones) | #28467A | 0.021 |
| Tritanopia (no blue cones) | #1C515A | 0.082 |
| Achromatopsia (no color) | #484848 | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #39457B
#39457B
oklch(40.8% 0.092 272.3)
- #5A4800
#5A4800
oklch(40.9% 0.084 92.4)
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 #39457B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.042
- Dark Slate Blue #483D8B ΔE 0.042
- Light Navy #155084 ΔE 0.043
- Twilight Blue #0A437A ΔE 0.046
- Dusk Blue #26538D ΔE 0.047
- Blueberry #464196 ΔE 0.051
- Twilight #4E518B ΔE 0.054
- Deep Sea Blue #015482 ΔE 0.055
Use #39457B 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.