#0063AA
Closest named color: Mid Blue (#276AB3). oklch(49.1% 0.137 249.4), rgb(0, 99, 170).
Aa
White text reads best on this color (6.24:1).
About this color
#0063AA is a medium-dark, moderately saturated blue. In OKLCH its lightness is 49%, its chroma 0.137 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.031 away. White text reads best on it, at 6.24:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.137) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.36:1 |
| White text | 6.24:1 |
Values
| HEX | #0063AA |
| RGB | rgb(0, 99, 170) |
| HSL | hsl(205, 100%, 33%) |
| OKLCH | oklch(49.1% 0.137 249.4) |
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 #0063AA | 6.24:1 | AA | Lc -85.6 | Fine for body text |
| Black text on #0063AA | 3.36:1 | AA large text | Lc 23.6 | Dividers and decoration only |
| #0063AA text on white | 6.24:1 | AA | Lc 80.4 | Fine for body text |
| #0063AA text on black | 3.36:1 | AA large text | Lc -21.4 | 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
#A0C5EA
oklch(80.9% 0.066 248.6)
-
Step 400
400
#6BA6E0
oklch(70.8% 0.105 249.1)
-
Step 500
500
#3F8ED7
oklch(63.1% 0.135 249.3)
-
Step 600
600
#1476C5
oklch(55.5% 0.148 249.6)
-
Step 700
700 (this color)
#0063AA
oklch(49.1% 0.137 249.4)
-
Step 800
800
#0A518A
oklch(42.7% 0.114 249.6)
-
Step 900
900
#14446E
oklch(37.8% 0.088 249)
-
Step 950
950
#0E2840
oklch(27% 0.055 249)
#0063AA 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) | #3F68AD | 0.043 |
| Deuteranopia (no green cones) | #225AA9 | 0.026 |
| Tritanopia (no blue cones) | #00747E | 0.098 |
| Achromatopsia (no color) | #616161 | 0.137 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0063AA
#0063AA
oklch(49.1% 0.137 249.4)
- #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 #0063AA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.031
- Peacock Blue #016795 ΔE 0.038
- Denim Blue #3B5B92 ΔE 0.049
- French Blue #436BAD ΔE 0.051
- Ocean Blue #03719C ΔE 0.051
- Dusky Blue #475F94 ΔE 0.055
- Denim #3B638C ΔE 0.057
- Light Navy Blue #2E5A88 ΔE 0.057
Use #0063AA 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.