#20397F
Closest named color: Twilight Blue (#0A437A). oklch(36.9% 0.123 265.8), rgb(32, 57, 127).
Aa
White text reads best on this color (10.75:1).
About this color
#20397F is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.123 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.032 away. White text reads best on it, at 10.75:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.123) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.95:1 |
| White text | 10.75:1 |
Values
| HEX | #20397F |
| RGB | rgb(32, 57, 127) |
| HSL | hsl(224, 60%, 31%) |
| OKLCH | oklch(36.9% 0.123 265.8) |
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 #20397F | 10.75:1 | AAA | Lc -98.5 | Preferred for body text |
| Black text on #20397F | 1.95:1 | Fails | Lc 9.4 | Not readable |
| #20397F text on white | 10.75:1 | AAA | Lc 94.5 | Preferred for body text |
| #20397F text on black | 1.95:1 | Fails | Lc -8.1 | 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
#F1F5FE
oklch(97% 0.013 266.7)
-
Step 100
100
#E1EAFC
oklch(93.6% 0.026 264.4)
-
Step 200
200
#C9D9FC
oklch(88.5% 0.051 265.9)
-
Step 300
300
#A5C0FD
oklch(81% 0.092 265.9)
-
Step 400
400
#759CFC
oklch(70.6% 0.147 266)
-
Step 500
500
#5380FA
oklch(63.1% 0.189 265.9)
-
Step 600
600
#3966E9
oklch(55.7% 0.204 265.6)
-
Step 700
700
#2D53CA
oklch(49% 0.19 265.9)
-
Step 800
800
#2545A3
oklch(42.6% 0.157 265.7)
-
Step 900
900 (this color)
#20397F
oklch(36.9% 0.123 265.8)
-
Step 950
950
#14234C
oklch(26.9% 0.078 266.1)
#20397F 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) | #064281 | 0.027 |
| Deuteranopia (no green cones) | #003A7E | 0.022 |
| Tritanopia (no blue cones) | #004A56 | 0.098 |
| Achromatopsia (no color) | #3E3E3E | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #20397F
#20397F
oklch(36.9% 0.123 265.8)
- #513C00
#513C00
oklch(36.9% 0.076 86.3)
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 #20397F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.032
- Marine Blue #01386A ΔE 0.044
- Cobalt #1E488F ΔE 0.047
- Dark Slate Blue #483D8B ΔE 0.063
- Light Navy #155084 ΔE 0.065
- Marine #042E60 ΔE 0.068
- Prussian Blue #1D3557 ΔE 0.070
- Blueberry #464196 ΔE 0.071
Use #20397F 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.