#06366A
Closest named color: Marine Blue (#01386A). oklch(33.6% 0.103 254.8), rgb(6, 54, 106).
Aa
White text reads best on this color (12.04:1).
About this color
#06366A is a dark, moderately saturated blue. In OKLCH its lightness is 34%, its chroma 0.103 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.006 away. White text reads best on it, at 12.04:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.103) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.74:1 |
| White text | 12.04:1 |
Values
| HEX | #06366A |
| RGB | rgb(6, 54, 106) |
| HSL | hsl(211, 89%, 22%) |
| OKLCH | oklch(33.6% 0.103 254.8) |
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 #06366A | 12.04:1 | AAA | Lc -100.7 | Preferred for body text |
| Black text on #06366A | 1.74:1 | Fails | Lc 0.0 | Not readable |
| #06366A text on white | 12.04:1 | AAA | Lc 97.0 | Preferred for body text |
| #06366A text on black | 1.74:1 | 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
#E0EBF9
oklch(93.6% 0.022 254.4)
-
Step 200
200
#C7DBF6
oklch(88.5% 0.043 255.9)
-
Step 300
300
#9FC4F2
oklch(81% 0.077 254.1)
-
Step 400
400
#69A3EC
oklch(70.6% 0.124 254.8)
-
Step 500
500
#3E8AE6
oklch(63.1% 0.158 255)
-
Step 600
600
#1572D4
oklch(55.6% 0.171 254.7)
-
Step 700
700
#025FB8
oklch(49.2% 0.159 254.7)
-
Step 800
800
#0B4E95
oklch(42.8% 0.132 254.9)
-
Step 900
900 (this color)
#06366A
oklch(33.6% 0.103 254.8)
-
Step 950
950
#0D2745
oklch(27% 0.064 254)
#06366A 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) | #193B6C | 0.022 |
| Deuteranopia (no green cones) | #003269 | 0.013 |
| Tritanopia (no blue cones) | #00434A | 0.079 |
| Achromatopsia (no color) | #363636 | 0.103 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #06366A
#06366A
oklch(33.6% 0.103 254.8)
- #4C3000
#4C3000
oklch(33.5% 0.071 74)
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 #06366A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.006
- Marine #042E60 ΔE 0.029
- Prussian Blue #1D3557 ΔE 0.036
- Twilight Blue #0A437A ΔE 0.046
- Midnight Green #073B4C ΔE 0.059
- Dark Blue Grey #1F3B4D ΔE 0.060
- Dark Grey Blue #29465B ΔE 0.072
- Midnight Blue #191970 ΔE 0.073
Use #06366A 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.