#1F63E9
Closest named color: Azul (#1D5DEC). oklch(54.3% 0.214 262), rgb(31, 99, 233).
Aa
White text reads best on this color (5.22:1).
About this color
#1F63E9 is a medium-dark, vivid blue. In OKLCH its lightness is 54%, its chroma 0.214 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Azul (#1D5DEC), ΔE 0.015 away. White text reads best on it, at 5.22:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.214) |
| Temperature | cool |
| Nearest name | Azul (#1D5DEC) |
| Black text | 4.01:1 |
| White text | 5.22:1 |
Values
| HEX | #1F63E9 |
| RGB | rgb(31, 99, 233) |
| HSL | hsl(220, 82%, 52%) |
| OKLCH | oklch(54.3% 0.214 262) |
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 #1F63E9 | 5.22:1 | AA | Lc -80.5 | Fine for body text |
| Black text on #1F63E9 | 4.01:1 | AA large text | Lc 28.9 | Dividers and decoration only |
| #1F63E9 text on white | 5.22:1 | AA | Lc 75.2 | Fine for body text |
| #1F63E9 text on black | 4.01:1 | AA large text | Lc -26.6 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EAFD
oklch(93.5% 0.028 263.4)
-
Step 200
200
#C6DAFD
oklch(88.5% 0.053 261.7)
-
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
#4282FE
oklch(63.1% 0.196 261.9)
-
Step 600
600 (this color)
#1F63E9
oklch(54.3% 0.214 262)
-
Step 700
700
#1655CF
oklch(49.2% 0.199 261.9)
-
Step 800
800
#1546A7
oklch(42.6% 0.165 262)
-
Step 900
900
#183C84
oklch(37.6% 0.128 262.2)
-
Step 950
950
#0F244D
oklch(27% 0.081 262.1)
#1F63E9 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) | #0076EE | 0.045 |
| Deuteranopia (no green cones) | #0064E6 | 0.011 |
| Tritanopia (no blue cones) | #00859C | 0.164 |
| Achromatopsia (no color) | #6C6C6C | 0.214 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F63E9
#1F63E9
oklch(54.3% 0.214 262)
- #906800
#906800
oklch(54.4% 0.112 82)
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 #1F63E9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Azul #1D5DEC ΔE 0.015
- Cerulean Blue #056EEE ΔE 0.026
- Neon Blue #4361EE ΔE 0.029
- Bright Blue #0165FC ΔE 0.030
- Royal Blue #4169E1 ΔE 0.034
- Warm Blue #4B57DB ΔE 0.047
- Electric Blue #0652FF ΔE 0.051
- Clear Blue #247AFD ΔE 0.063
Use #1F63E9 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.