#063B77
Closest named color: Marine Blue (#01386A). oklch(35.8% 0.115 255.9), rgb(6, 59, 119).
Aa
White text reads best on this color (11.05:1).
About this color
#063B77 is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.115 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.024 away. White text reads best on it, at 11.05:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.115) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.89:1 |
| White text | 11.05:1 |
Values
| HEX | #063B77 |
| RGB | rgb(6, 59, 119) |
| HSL | hsl(212, 90%, 25%) |
| OKLCH | oklch(35.8% 0.115 255.9) |
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 #063B77 | 11.05:1 | AAA | Lc -98.9 | Preferred for body text |
| Black text on #063B77 | 1.89:1 | Fails | Lc 8.9 | Not readable |
| #063B77 text on white | 11.05:1 | AAA | Lc 95.0 | Preferred for body text |
| #063B77 text on black | 1.89:1 | Fails | Lc -7.6 | 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 900.
-
Step 50
50
#F0F6FD
oklch(97.1% 0.011 252.1)
-
Step 100
100
#DFEBFB
oklch(93.6% 0.025 255.6)
-
Step 200
200
#C5DBF9
oklch(88.5% 0.048 256.2)
-
Step 300
300
#9CC3F8
oklch(80.8% 0.086 256.2)
-
Step 400
400
#64A2F5
oklch(70.6% 0.138 256.2)
-
Step 500
500
#3488F1
oklch(63% 0.177 256)
-
Step 600
600
#006FDE
oklch(55.5% 0.189 256)
-
Step 700
700
#005DBC
oklch(49% 0.167 256)
-
Step 800
800
#004C9C
oklch(42.7% 0.146 256)
-
Step 900
900 (this color)
#063B77
oklch(35.8% 0.115 255.9)
-
Step 950
950
#0A2649
oklch(26.9% 0.073 255.8)
#063B77 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) | #174179 | 0.022 |
| Deuteranopia (no green cones) | #003776 | 0.013 |
| Tritanopia (no blue cones) | #004A53 | 0.087 |
| Achromatopsia (no color) | #3C3C3C | 0.115 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #063B77
#063B77
oklch(35.8% 0.115 255.9)
- #533600
#533600
oklch(35.8% 0.075 75.7)
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 #063B77, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.024
- Twilight Blue #0A437A ΔE 0.024
- Marine #042E60 ΔE 0.054
- Prussian Blue #1D3557 ΔE 0.056
- Cobalt #1E488F ΔE 0.058
- Light Navy #155084 ΔE 0.066
- Dark Grey Blue #29465B ΔE 0.071
- Dark Blue Grey #1F3B4D ΔE 0.075
Use #063B77 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.