#1B63ED
Closest named color: Azul (#1D5DEC). oklch(54.6% 0.219 261.8), rgb(27, 99, 237).
Aa
White text reads best on this color (5.17:1).
About this color
#1B63ED is a medium-dark, vivid blue. In OKLCH its lightness is 55%, its chroma 0.219 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Azul (#1D5DEC), ΔE 0.014 away. White text reads best on it, at 5.17:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.219) |
| Temperature | cool |
| Nearest name | Azul (#1D5DEC) |
| Black text | 4.05:1 |
| White text | 5.17:1 |
Values
| HEX | #1B63ED |
| RGB | rgb(27, 99, 237) |
| HSL | hsl(219, 85%, 52%) |
| OKLCH | oklch(54.6% 0.219 261.8) |
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 #1B63ED | 5.17:1 | AA | Lc -80.2 | Fine for body text |
| Black text on #1B63ED | 4.05:1 | AA large text | Lc 29.2 | Dividers and decoration only |
| #1B63ED text on white | 5.17:1 | AA | Lc 74.8 | Content text, not long reading |
| #1B63ED text on black | 4.05:1 | AA large text | Lc -26.9 | 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
#F1F6FF
oklch(97.2% 0.013 262.4)
-
Step 100
100
#E0EAFE
oklch(93.6% 0.029 264.4)
-
Step 200
200
#C6DAFE
oklch(88.5% 0.054 262.2)
-
Step 300
300
#9FC1FF
oklch(80.9% 0.096 262.2)
-
Step 400
400
#6A9EFF
oklch(70.6% 0.153 261.9)
-
Step 500
500
#4182FF
oklch(63.1% 0.198 261.8)
-
Step 600
600 (this color)
#1B63ED
oklch(54.6% 0.219 261.8)
-
Step 700
700
#1254D2
oklch(49.2% 0.204 261.9)
-
Step 800
800
#1246A9
oklch(42.8% 0.168 261.7)
-
Step 900
900
#163C86
oklch(37.7% 0.132 261.9)
-
Step 950
950
#0E244E
oklch(27% 0.082 261.8)
#1B63ED 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) | #0077F2 | 0.048 |
| Deuteranopia (no green cones) | #0064EA | 0.009 |
| Tritanopia (no blue cones) | #00869E | 0.167 |
| Achromatopsia (no color) | #6D6D6D | 0.220 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B63ED
#1B63ED
oklch(54.6% 0.219 261.8)
- #916800
#916800
oklch(54.5% 0.113 81.4)
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 #1B63ED, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Azul #1D5DEC ΔE 0.014
- Bright Blue #0165FC ΔE 0.023
- Cerulean Blue #056EEE ΔE 0.025
- Neon Blue #4361EE ΔE 0.030
- Royal Blue #4169E1 ΔE 0.038
- Electric Blue #0652FF ΔE 0.046
- Warm Blue #4B57DB ΔE 0.051
- Clear Blue #247AFD ΔE 0.061
Use #1B63ED 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.