#1B64F0
Closest named color: Azul (#1D5DEC). oklch(55% 0.222 261.8), rgb(27, 100, 240).
Aa
White text reads best on this color (5.08:1).
About this color
#1B64F0 is a medium-dark, vivid blue. In OKLCH its lightness is 55%, its chroma 0.222 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Azul (#1D5DEC), ΔE 0.017 away. White text reads best on it, at 5.08:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.222) |
| Temperature | cool |
| Nearest name | Azul (#1D5DEC) |
| Black text | 4.12:1 |
| White text | 5.08:1 |
Values
| HEX | #1B64F0 |
| RGB | rgb(27, 100, 240) |
| HSL | hsl(219, 88%, 52%) |
| OKLCH | oklch(55% 0.222 261.8) |
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 #1B64F0 | 5.08:1 | AA | Lc -79.7 | Fine for body text |
| Black text on #1B64F0 | 4.12:1 | AA large text | Lc 29.8 | Dividers and decoration only |
| #1B64F0 text on white | 5.08:1 | AA | Lc 74.3 | Content text, not long reading |
| #1B64F0 text on black | 4.12:1 | AA large text | Lc -27.4 | 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 600.
-
Step 50
50
#F1F6FF
oklch(97.2% 0.013 262.4)
-
Step 100
100
#DFEAFE
oklch(93.5% 0.03 262.5)
-
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
#6A9EFF
oklch(70.6% 0.153 261.9)
-
Step 500
500
#4182FF
oklch(63.1% 0.198 261.8)
-
Step 600
600 (this color)
#1B64F0
oklch(55% 0.222 261.8)
-
Step 700
700
#1053D3
oklch(49% 0.207 261.9)
-
Step 800
800
#1145AA
oklch(42.6% 0.171 261.9)
-
Step 900
900
#153C87
oklch(37.7% 0.133 261.8)
-
Step 950
950
#0D244F
oklch(27% 0.084 261.5)
#1B64F0 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) | #0078F5 | 0.048 |
| Deuteranopia (no green cones) | #0065ED | 0.009 |
| Tritanopia (no blue cones) | #0088A0 | 0.170 |
| Achromatopsia (no color) | #6E6E6E | 0.222 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B64F0
#1B64F0
oklch(55% 0.222 261.8)
- #926A00
#926A00
oklch(55.1% 0.113 82.4)
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 #1B64F0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Azul #1D5DEC ΔE 0.017
- Bright Blue #0165FC ΔE 0.019
- Cerulean Blue #056EEE ΔE 0.023
- Neon Blue #4361EE ΔE 0.029
- Royal Blue #4169E1 ΔE 0.039
- Electric Blue #0652FF ΔE 0.046
- Warm Blue #4B57DB ΔE 0.054
- Clear Blue #247AFD ΔE 0.057
Use #1B64F0 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.