#063865
Closest named color: Marine Blue (#01386A). oklch(33.7% 0.093 251.4), rgb(6, 56, 101).
Aa
White text reads best on this color (11.92:1).
About this color
#063865 is a dark, moderately saturated blue. In OKLCH its lightness is 34%, its chroma 0.093 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.009 away. White text reads best on it, at 11.92:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.093) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.76:1 |
| White text | 11.92:1 |
Values
| HEX | #063865 |
| RGB | rgb(6, 56, 101) |
| HSL | hsl(208, 89%, 21%) |
| OKLCH | oklch(33.7% 0.093 251.4) |
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 #063865 | 11.92:1 | AAA | Lc -100.5 | Preferred for body text |
| Black text on #063865 | 1.76:1 | Fails | Lc 0.0 | Not readable |
| #063865 text on white | 11.92:1 | AAA | Lc 96.9 | Preferred for body text |
| #063865 text on black | 1.76:1 | Fails | Lc 0.0 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF7
oklch(93.5% 0.02 250.4)
-
Step 200
200
#C7DCF3
oklch(88.6% 0.039 250.7)
-
Step 300
300
#A0C4ED
oklch(80.8% 0.07 252)
-
Step 400
400
#6AA5E4
oklch(70.7% 0.112 251.1)
-
Step 500
500
#3E8DDC
oklch(63.2% 0.142 251.1)
-
Step 600
600
#1475CA
oklch(55.6% 0.155 251.4)
-
Step 700
700
#0062AF
oklch(49.2% 0.144 251.3)
-
Step 800
800
#0A508D
oklch(42.6% 0.119 251.3)
-
Step 900
900 (this color)
#063865
oklch(33.7% 0.093 251.4)
-
Step 950
950
#0E2842
oklch(27.1% 0.058 250.8)
#063865 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) | #213B67 | 0.025 |
| Deuteranopia (no green cones) | #103364 | 0.015 |
| Tritanopia (no blue cones) | #004349 | 0.069 |
| Achromatopsia (no color) | #373737 | 0.093 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #063865
#063865
oklch(33.7% 0.093 251.4)
- #4E3000
#4E3000
oklch(33.8% 0.072 71.9)
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 #063865, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.009
- Prussian Blue #1D3557 ΔE 0.028
- Marine #042E60 ΔE 0.032
- Twilight Blue #0A437A ΔE 0.047
- Midnight Green #073B4C ΔE 0.048
- Dark Blue Grey #1F3B4D ΔE 0.049
- Dark Grey Blue #29465B ΔE 0.063
- Gunmetal #293241 ΔE 0.067
Use #063865 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.