#1663FB
Closest named color: Bright Blue (#0165FC). oklch(55.7% 0.237 262.1), rgb(22, 99, 251).
Aa
White text reads best on this color (4.98:1).
About this color
#1663FB is a medium-dark, vivid blue. In OKLCH its lightness is 56%, its chroma 0.237 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Bright Blue (#0165FC), ΔE 0.006 away. White text reads best on it, at 4.98:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.237) |
| Temperature | cool |
| Nearest name | Bright Blue (#0165FC) |
| Black text | 4.21:1 |
| White text | 4.98:1 |
Values
| HEX | #1663FB |
| RGB | rgb(22, 99, 251) |
| HSL | hsl(220, 97%, 54%) |
| OKLCH | oklch(55.7% 0.237 262.1) |
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 #1663FB | 4.98:1 | AA | Lc -79.0 | Fine for body text |
| Black text on #1663FB | 4.21:1 | AA large text | Lc 30.5 | Non-text elements, placeholder text |
| #1663FB text on white | 4.98:1 | AA | Lc 73.5 | Content text, not long reading |
| #1663FB text on black | 4.21:1 | AA large text | Lc -28.2 | 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 600.
-
Step 50
50
#F0F6FF
oklch(97.1% 0.014 258.3)
-
Step 100
100
#DFEAFF
oklch(93.5% 0.031 263.5)
-
Step 200
200
#C5DAFF
oklch(88.5% 0.056 261.8)
-
Step 300
300
#9FC1FF
oklch(80.9% 0.096 262.2)
-
Step 400
400
#6B9EFF
oklch(70.7% 0.153 262.2)
-
Step 500
500
#4282FF
oklch(63.2% 0.198 262)
-
Step 600
600 (this color)
#1663FB
oklch(55.7% 0.237 262.1)
-
Step 700
700
#0750DB
oklch(49.1% 0.222 262.2)
-
Step 800
800
#0B43B1
oklch(42.7% 0.183 262.1)
-
Step 900
900
#123A8C
oklch(37.7% 0.144 262.3)
-
Step 950
950
#0C2352
oklch(27% 0.091 262.4)
#1663FB 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) | #007AFF | 0.054 |
| Deuteranopia (no green cones) | #0066F8 | 0.009 |
| Tritanopia (no blue cones) | #008BA6 | 0.180 |
| Achromatopsia (no color) | #707070 | 0.238 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1663FB
#1663FB
oklch(55.7% 0.237 262.1)
- #956C00
#956C00
oklch(55.8% 0.115 82.2)
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 #1663FB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bright Blue #0165FC ΔE 0.006
- Azul #1D5DEC ΔE 0.026
- Cerulean Blue #056EEE ΔE 0.032
- Neon Blue #4361EE ΔE 0.036
- Electric Blue #0652FF ΔE 0.038
- Royal Blue #4169E1 ΔE 0.052
- Clear Blue #247AFD ΔE 0.056
- Warm Blue #4B57DB ΔE 0.065
Use #1663FB 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.