#1664F5
Closest named color: Bright Blue (#0165FC). oklch(55.3% 0.229 261.7), rgb(22, 100, 245).
Aa
White text reads best on this color (5.02:1).
About this color
#1664F5 is a medium-dark, vivid blue. In OKLCH its lightness is 55%, its chroma 0.229 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Bright Blue (#0165FC), ΔE 0.011 away. White text reads best on it, at 5.02:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.229) |
| Temperature | cool |
| Nearest name | Bright Blue (#0165FC) |
| Black text | 4.17:1 |
| White text | 5.02:1 |
Values
| HEX | #1664F5 |
| RGB | rgb(22, 100, 245) |
| HSL | hsl(219, 92%, 52%) |
| OKLCH | oklch(55.3% 0.229 261.7) |
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 #1664F5 | 5.02:1 | AA | Lc -79.3 | Fine for body text |
| Black text on #1664F5 | 4.17:1 | AA large text | Lc 30.2 | Non-text elements, placeholder text |
| #1664F5 text on white | 5.02:1 | AA | Lc 73.9 | Content text, not long reading |
| #1664F5 text on black | 4.17:1 | AA large text | Lc -27.8 | 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
#DFEBFE
oklch(93.7% 0.029 259.6)
-
Step 200
200
#C5DAFF
oklch(88.5% 0.056 261.8)
-
Step 300
300
#9EC1FF
oklch(80.8% 0.096 261.6)
-
Step 400
400
#6A9EFF
oklch(70.6% 0.153 261.9)
-
Step 500
500
#4082FF
oklch(63.1% 0.198 261.6)
-
Step 600
600 (this color)
#1664F5
oklch(55.3% 0.229 261.7)
-
Step 700
700
#0852D6
oklch(49% 0.213 261.7)
-
Step 800
800
#0C45AD
oklch(42.8% 0.176 261.5)
-
Step 900
900
#133B89
oklch(37.6% 0.138 261.9)
-
Step 950
950
#0C2450
oklch(27.1% 0.086 261.3)
#1664F5 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) | #0079FA | 0.050 |
| Deuteranopia (no green cones) | #0065F2 | 0.007 |
| Tritanopia (no blue cones) | #008AA3 | 0.175 |
| Achromatopsia (no color) | #6F6F6F | 0.229 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1664F5
#1664F5
oklch(55.3% 0.229 261.7)
- #946A00
#946A00
oklch(55.3% 0.114 81.2)
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 #1664F5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bright Blue #0165FC ΔE 0.011
- Azul #1D5DEC ΔE 0.021
- Cerulean Blue #056EEE ΔE 0.026
- Neon Blue #4361EE ΔE 0.032
- Electric Blue #0652FF ΔE 0.042
- Royal Blue #4169E1 ΔE 0.045
- Clear Blue #247AFD ΔE 0.056
- Warm Blue #4B57DB ΔE 0.059
Use #1664F5 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.