#0063AB
Closest named color: Mid Blue (#276AB3). oklch(49.2% 0.138 249.7), rgb(0, 99, 171).
Aa
White text reads best on this color (6.22:1).
About this color
#0063AB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 49%, its chroma 0.138 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.030 away. White text reads best on it, at 6.22:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.138) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.37:1 |
| White text | 6.22:1 |
Values
| HEX | #0063AB |
| RGB | rgb(0, 99, 171) |
| HSL | hsl(205, 100%, 34%) |
| OKLCH | oklch(49.2% 0.138 249.7) |
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 #0063AB | 6.22:1 | AA | Lc -85.5 | Fine for body text |
| Black text on #0063AB | 3.37:1 | AA large text | Lc 23.7 | Dividers and decoration only |
| #0063AB text on white | 6.22:1 | AA | Lc 80.4 | Fine for body text |
| #0063AB text on black | 3.37:1 | AA large text | Lc -21.5 | Dividers and decoration only |
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 700.
-
Step 50
50
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E0EBF7
oklch(93.5% 0.02 250.4)
-
Step 200
200
#C7DCF1
oklch(88.5% 0.037 248.2)
-
Step 300
300
#A0C5EB
oklch(81% 0.067 249.3)
-
Step 400
400
#6BA5E1
oklch(70.6% 0.107 250.3)
-
Step 500
500
#3E8ED8
oklch(63.2% 0.136 249.4)
-
Step 600
600
#1476C6
oklch(55.6% 0.149 249.9)
-
Step 700
700 (this color)
#0063AB
oklch(49.2% 0.138 249.7)
-
Step 800
800
#0A518A
oklch(42.7% 0.114 249.6)
-
Step 900
900
#14446F
oklch(37.8% 0.089 249.5)
-
Step 950
950
#0E2841
oklch(27.1% 0.057 249.9)
#0063AB 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) | #3E68AE | 0.042 |
| Deuteranopia (no green cones) | #205AAA | 0.025 |
| Tritanopia (no blue cones) | #00747E | 0.099 |
| Achromatopsia (no color) | #616161 | 0.138 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0063AB
#0063AB
oklch(49.2% 0.138 249.7)
- #875400
#875400
oklch(49.2% 0.107 69.6)
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 #0063AB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.030
- Peacock Blue #016795 ΔE 0.040
- Denim Blue #3B5B92 ΔE 0.050
- French Blue #436BAD ΔE 0.051
- Ocean Blue #03719C ΔE 0.052
- Dusky Blue #475F94 ΔE 0.056
- Denim #3B638C ΔE 0.058
- Light Navy Blue #2E5A88 ΔE 0.059
Use #0063AB 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.