#063A7B
Closest named color: Twilight Blue (#0A437A). oklch(35.9% 0.122 257.3), rgb(6, 58, 123).
Aa
White text reads best on this color (11.05:1).
About this color
#063A7B is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.122 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.027 away. White text reads best on it, at 11.05:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.122) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.89:1 |
| White text | 11.05:1 |
Values
| HEX | #063A7B |
| RGB | rgb(6, 58, 123) |
| HSL | hsl(213, 91%, 25%) |
| OKLCH | oklch(35.9% 0.122 257.3) |
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 #063A7B | 11.05:1 | AAA | Lc -98.9 | Preferred for body text |
| Black text on #063A7B | 1.89:1 | Fails | Lc 8.9 | Not readable |
| #063A7B text on white | 11.05:1 | AAA | Lc 95.0 | Preferred for body text |
| #063A7B text on black | 1.89:1 | Fails | Lc -7.6 | 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
#F0F6FE
oklch(97.1% 0.012 255.5)
-
Step 100
100
#DFEBFC
oklch(93.6% 0.026 257)
-
Step 200
200
#C4DBFB
oklch(88.5% 0.051 256.7)
-
Step 300
300
#9BC3FC
oklch(80.9% 0.092 257.2)
-
Step 400
400
#63A1FA
oklch(70.7% 0.146 257.5)
-
Step 500
500
#3386F8
oklch(63% 0.188 257.6)
-
Step 600
600
#006DE5
oklch(55.6% 0.201 257.4)
-
Step 700
700
#005BC2
oklch(49% 0.177 257.5)
-
Step 800
800
#004AA1
oklch(42.6% 0.155 257.6)
-
Step 900
900 (this color)
#063A7B
oklch(35.9% 0.122 257.3)
-
Step 950
950
#0A264B
oklch(27.1% 0.076 256.8)
#063A7B 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) | #0E417D | 0.022 |
| Deuteranopia (no green cones) | #00377A | 0.010 |
| Tritanopia (no blue cones) | #004A54 | 0.093 |
| Achromatopsia (no color) | #3C3C3C | 0.122 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #063A7B
#063A7B
oklch(35.9% 0.122 257.3)
- #523700
#523700
oklch(35.9% 0.075 78.1)
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 #063A7B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.027
- Marine Blue #01386A ΔE 0.030
- Cobalt #1E488F ΔE 0.055
- Marine #042E60 ΔE 0.057
- Prussian Blue #1D3557 ΔE 0.063
- Light Navy #155084 ΔE 0.068
- Deep Sea Blue #015482 ΔE 0.077
- Dark Grey Blue #29465B ΔE 0.078
Use #063A7B 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.