#0663B2
Closest named color: Mid Blue (#276AB3). oklch(49.7% 0.146 252.1), rgb(6, 99, 178).
Aa
White text reads best on this color (6.11:1).
About this color
#0663B2 is a medium-dark, vivid blue. In OKLCH its lightness is 50%, its chroma 0.146 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.027 away. White text reads best on it, at 6.11:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.146) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.43:1 |
| White text | 6.11:1 |
Values
| HEX | #0663B2 |
| RGB | rgb(6, 99, 178) |
| HSL | hsl(208, 93%, 36%) |
| OKLCH | oklch(49.7% 0.146 252.1) |
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 #0663B2 | 6.11:1 | AA | Lc -85.1 | Fine for body text |
| Black text on #0663B2 | 3.43:1 | AA large text | Lc 24.2 | Dividers and decoration only |
| #0663B2 text on white | 6.11:1 | AA | Lc 79.9 | Fine for body text |
| #0663B2 text on black | 3.43:1 | AA large text | Lc -22.0 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF8
oklch(93.6% 0.021 252.5)
-
Step 200
200
#C7DBF3
oklch(88.4% 0.04 253)
-
Step 300
300
#A0C4EE
oklch(80.9% 0.071 252.6)
-
Step 400
400
#6AA4E5
oklch(70.6% 0.114 252.3)
-
Step 500
500
#3F8CDE
oklch(63.1% 0.145 252.4)
-
Step 600
600
#1574CB
oklch(55.5% 0.157 252.1)
-
Step 700
700 (this color)
#0663B2
oklch(49.7% 0.146 252.1)
-
Step 800
800
#0B508E
oklch(42.7% 0.12 251.8)
-
Step 900
900
#144372
oklch(37.8% 0.095 251.9)
-
Step 950
950
#0E2743
oklch(26.9% 0.061 253.2)
#0663B2 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) | #3969B5 | 0.037 |
| Deuteranopia (no green cones) | #135BB0 | 0.021 |
| Tritanopia (no blue cones) | #007682 | 0.106 |
| Achromatopsia (no color) | #626262 | 0.146 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0663B2
#0663B2
oklch(49.7% 0.146 252.1)
- #875700
#875700
oklch(49.8% 0.106 72.4)
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 #0663B2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.027
- French Blue #436BAD ΔE 0.050
- Peacock Blue #016795 ΔE 0.051
- Denim Blue #3B5B92 ΔE 0.057
- Ocean Blue #03719C ΔE 0.059
- Dusky Blue #475F94 ΔE 0.062
- Flat Blue #3C73A8 ΔE 0.064
- Muted Blue #3B719F ΔE 0.065
Use #0663B2 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.