#063756
Closest named color: Prussian Blue (#1D3557). oklch(32.4% 0.073 243.1), rgb(6, 55, 86).
Aa
White text reads best on this color (12.43:1).
About this color
#063756 is a dark, moderately saturated blue. In OKLCH its lightness is 32%, its chroma 0.073 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.019 away. White text reads best on it, at 12.43:1.
| Hue family | Blues |
| Lightness | dark (32%) |
| Chroma | moderately saturated (0.073) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.68:1 |
| White text | 12.43:1 |
Values
| HEX | #063756 |
| RGB | rgb(6, 55, 86) |
| HSL | hsl(203, 87%, 18%) |
| OKLCH | oklch(32.4% 0.073 243.1) |
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 #063756 | 12.43:1 | AAA | Lc -101.4 | Preferred for body text |
| Black text on #063756 | 1.68:1 | Fails | Lc 0.0 | Not readable |
| #063756 text on white | 12.43:1 | AAA | Lc 97.9 | Preferred for body text |
| #063756 text on black | 1.68:1 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1EBF4
oklch(93.5% 0.016 245.1)
-
Step 200
200
#C9DCEC
oklch(88.5% 0.03 243.4)
-
Step 300
300
#A3C5E2
oklch(80.8% 0.055 244.3)
-
Step 400
400
#6FA7D3
oklch(70.7% 0.087 243.1)
-
Step 500
500
#4490C8
oklch(63% 0.113 243.3)
-
Step 600
600
#1F7AB5
oklch(55.7% 0.122 243)
-
Step 700
700
#0E669C
oklch(49.1% 0.114 243.4)
-
Step 800
800
#12547E
oklch(42.8% 0.094 242.6)
-
Step 900
900 (this color)
#063756
oklch(32.4% 0.073 243.1)
-
Step 950
950
#10293B
oklch(27.1% 0.046 242.4)
#063756 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) | #283857 | 0.033 |
| Deuteranopia (no green cones) | #1D3155 | 0.024 |
| Tritanopia (no blue cones) | #003F42 | 0.051 |
| Achromatopsia (no color) | #343434 | 0.073 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #063756
#063756
oklch(32.4% 0.073 243.1)
- #4D2A00
#4D2A00
oklch(32.3% 0.073 63.8)
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 #063756, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.019
- Midnight Green #073B4C ΔE 0.025
- Dark Blue Grey #1F3B4D ΔE 0.031
- Marine Blue #01386A ΔE 0.035
- Marine #042E60 ΔE 0.036
- Gunmetal #293241 ΔE 0.047
- Space Cadet #2B2D42 ΔE 0.052
- Dark Grey Blue #29465B ΔE 0.062
Use #063756 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.