#063E88
Closest named color: Twilight Blue (#0A437A). oklch(37.9% 0.135 258.3), rgb(6, 62, 136).
Aa
White text reads best on this color (10.23:1).
About this color
#063E88 is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.135 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.029 away. White text reads best on it, at 10.23:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.135) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.05:1 |
| White text | 10.23:1 |
Values
| HEX | #063E88 |
| RGB | rgb(6, 62, 136) |
| HSL | hsl(214, 92%, 28%) |
| OKLCH | oklch(37.9% 0.135 258.3) |
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 #063E88 | 10.23:1 | AAA | Lc -97.2 | Preferred for body text |
| Black text on #063E88 | 2.05:1 | Fails | Lc 10.8 | Not readable |
| #063E88 text on white | 10.23:1 | AAA | Lc 93.1 | Preferred for body text |
| #063E88 text on black | 2.05:1 | Fails | Lc -9.4 | 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
#F0F6FF
oklch(97.1% 0.014 258.3)
-
Step 100
100
#DEEBFE
oklch(93.6% 0.029 257.8)
-
Step 200
200
#C3DBFF
oklch(88.5% 0.056 258.4)
-
Step 300
300
#9AC3FF
oklch(81% 0.096 257.8)
-
Step 400
400
#61A0FF
oklch(70.6% 0.154 258.4)
-
Step 500
500
#2F85FF
oklch(63.2% 0.199 258.2)
-
Step 600
600
#006BEA
oklch(55.6% 0.209 258.4)
-
Step 700
700
#005AC6
oklch(49.1% 0.184 258.2)
-
Step 800
800
#0049A4
oklch(42.7% 0.16 258.3)
-
Step 900
900 (this color)
#063E88
oklch(37.9% 0.135 258.3)
-
Step 950
950
#07254F
oklch(27.1% 0.085 257.9)
#063E88 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) | #02478B | 0.025 |
| Deuteranopia (no green cones) | #003C87 | 0.007 |
| Tritanopia (no blue cones) | #00505C | 0.102 |
| Achromatopsia (no color) | #414141 | 0.135 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #063E88
#063E88
oklch(37.9% 0.135 258.3)
- #593C00
#593C00
oklch(38% 0.079 78.1)
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 #063E88, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.029
- Cobalt #1E488F ΔE 0.036
- Marine Blue #01386A ΔE 0.054
- Light Navy #155084 ΔE 0.056
- Sapphire #2138AB ΔE 0.062
- Deep Sea Blue #015482 ΔE 0.067
- Dusk Blue #26538D ΔE 0.068
- Dark Slate Blue #483D8B ΔE 0.072
Use #063E88 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.