#063557
Closest named color: Prussian Blue (#1D3557). oklch(31.9% 0.077 246.2), rgb(6, 53, 87).
Aa
White text reads best on this color (12.69:1).
About this color
#063557 is a dark, moderately saturated blue. In OKLCH its lightness is 32%, its chroma 0.077 and its hue 246°. 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 12.69:1.
| Hue family | Blues |
| Lightness | dark (32%) |
| Chroma | moderately saturated (0.077) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.65:1 |
| White text | 12.69:1 |
Values
| HEX | #063557 |
| RGB | rgb(6, 53, 87) |
| HSL | hsl(205, 87%, 18%) |
| OKLCH | oklch(31.9% 0.077 246.2) |
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 #063557 | 12.69:1 | AAA | Lc -101.8 | Preferred for body text |
| Black text on #063557 | 1.65:1 | Fails | Lc 0.0 | Not readable |
| #063557 text on white | 12.69:1 | AAA | Lc 98.4 | Preferred for body text |
| #063557 text on black | 1.65:1 | 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 950.
-
Step 50
50
#EFF6FD
oklch(97% 0.012 248)
-
Step 100
100
#DCECFB
oklch(93.6% 0.027 246.3)
-
Step 200
200
#BFDDF9
oklch(88.5% 0.05 246.6)
-
Step 300
300
#8FC7F8
oklch(80.9% 0.091 245.6)
-
Step 400
400
#46A7F5
oklch(70.6% 0.146 246.3)
-
Step 500
500
#008FE5
oklch(63.1% 0.163 246.3)
-
Step 600
600
#0078C1
oklch(55.5% 0.143 246.2)
-
Step 700
700
#0065A4
oklch(49.2% 0.127 246.3)
-
Step 800
800
#005287
oklch(42.6% 0.111 246.5)
-
Step 900
900
#004572
oklch(37.9% 0.097 246)
-
Step 950
950 (this color)
#063557
oklch(31.9% 0.077 246.2)
#063557 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) | #253758 | 0.030 |
| Deuteranopia (no green cones) | #192F56 | 0.022 |
| Tritanopia (no blue cones) | #003D41 | 0.054 |
| Achromatopsia (no color) | #333333 | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #063557
#063557
oklch(31.9% 0.077 246.2)
- #4A2A00
#4A2A00
oklch(31.9% 0.071 66.7)
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 #063557, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.019
- Marine #042E60 ΔE 0.030
- Midnight Green #073B4C ΔE 0.032
- Marine Blue #01386A ΔE 0.033
- Dark Blue Grey #1F3B4D ΔE 0.037
- Gunmetal #293241 ΔE 0.049
- Space Cadet #2B2D42 ΔE 0.052
- Oxford Blue #1B263B ΔE 0.063
Use #063557 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.