#063587
Closest named color: Twilight Blue (#0A437A). oklch(35.8% 0.145 261.1), rgb(6, 53, 135).
Aa
White text reads best on this color (11.24:1).
About this color
#063587 is a dark, vivid blue. In OKLCH its lightness is 36%, its chroma 0.145 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.047 away. White text reads best on it, at 11.24:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | vivid (0.145) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.86:1 |
| White text | 11.24:1 |
Values
| HEX | #063587 |
| RGB | rgb(6, 53, 135) |
| HSL | hsl(218, 91%, 28%) |
| OKLCH | oklch(35.8% 0.145 261.1) |
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 #063587 | 11.24:1 | AAA | Lc -99.1 | Preferred for body text |
| Black text on #063587 | 1.86:1 | Fails | Lc 8.7 | Not readable |
| #063587 text on white | 11.24:1 | AAA | Lc 95.2 | Preferred for body text |
| #063587 text on black | 1.86:1 | Fails | Lc -7.4 | 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
#F0F6FF
oklch(97.1% 0.014 258.3)
-
Step 100
100
#DFEBFF
oklch(93.7% 0.03 260.7)
-
Step 200
200
#C5DAFF
oklch(88.5% 0.056 261.8)
-
Step 300
300
#9EC1FF
oklch(80.8% 0.096 261.6)
-
Step 400
400
#689FFF
oklch(70.7% 0.153 260.8)
-
Step 500
500
#3E82FF
oklch(63% 0.199 261.3)
-
Step 600
600
#0063FD
oklch(55.6% 0.242 261.1)
-
Step 700
700
#0053D7
oklch(49.2% 0.214 261.1)
-
Step 800
800
#0043B2
oklch(42.7% 0.186 261.1)
-
Step 900
900 (this color)
#063587
oklch(35.8% 0.145 261.1)
-
Step 950
950
#092352
oklch(26.9% 0.092 261.1)
#063587 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) | #00418A | 0.032 |
| Deuteranopia (no green cones) | #003585 | 0.005 |
| Tritanopia (no blue cones) | #004A58 | 0.111 |
| Achromatopsia (no color) | #3B3B3B | 0.146 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #063587
#063587
oklch(35.8% 0.145 261.1)
- #503800
#503800
oklch(35.9% 0.074 81.7)
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 #063587, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.047
- Marine Blue #01386A ΔE 0.051
- Cobalt #1E488F ΔE 0.059
- Royal #0C1793 ΔE 0.061
- Sapphire #2138AB ΔE 0.065
- Marine #042E60 ΔE 0.070
- Midnight Blue #191970 ΔE 0.076
- Light Navy #155084 ΔE 0.080
Use #063587 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.