#1664D8
Closest named color: Azul (#1D5DEC). oklch(53% 0.192 259.4), rgb(22, 100, 216).
Aa
White text reads best on this color (5.45:1).
About this color
#1664D8 is a medium-dark, vivid blue. In OKLCH its lightness is 53%, its chroma 0.192 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Azul (#1D5DEC), ΔE 0.035 away. White text reads best on it, at 5.45:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.192) |
| Temperature | cool |
| Nearest name | Azul (#1D5DEC) |
| Black text | 3.84:1 |
| White text | 5.45:1 |
Values
| HEX | #1664D8 |
| RGB | rgb(22, 100, 216) |
| HSL | hsl(216, 82%, 47%) |
| OKLCH | oklch(53% 0.192 259.4) |
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 #1664D8 | 5.45:1 | AA | Lc -81.8 | Fine for body text |
| Black text on #1664D8 | 3.84:1 | AA large text | Lc 27.6 | Dividers and decoration only |
| #1664D8 text on white | 5.45:1 | AA | Lc 76.5 | Fine for body text |
| #1664D8 text on black | 3.84:1 | AA large text | Lc -25.2 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBFB
oklch(93.7% 0.025 257.6)
-
Step 200
200
#C7DAFA
oklch(88.4% 0.049 260.9)
-
Step 300
300
#A0C2F9
oklch(80.9% 0.087 259.9)
-
Step 400
400
#6BA0F6
oklch(70.6% 0.139 259.7)
-
Step 500
500
#4286F2
oklch(63.1% 0.176 259.4)
-
Step 600
600 (this color)
#1664D8
oklch(53% 0.192 259.4)
-
Step 700
700
#125AC4
oklch(49.2% 0.179 259.4)
-
Step 800
800
#134A9E
oklch(42.7% 0.148 259.4)
-
Step 900
900
#173F7E
oklch(37.8% 0.116 259.4)
-
Step 950
950
#0F2549
oklch(26.9% 0.073 259.8)
#1664D8 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) | #0072DC | 0.035 |
| Deuteranopia (no green cones) | #0061D6 | 0.011 |
| Tritanopia (no blue cones) | #008194 | 0.147 |
| Achromatopsia (no color) | #696969 | 0.193 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1664D8
#1664D8
oklch(53% 0.192 259.4)
- #8D6300
#8D6300
oklch(53% 0.11 79.6)
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 #1664D8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Azul #1D5DEC ΔE 0.035
- Royal Blue #4169E1 ΔE 0.038
- Cerulean Blue #056EEE ΔE 0.040
- Neon Blue #4361EE ΔE 0.048
- Warm Blue #4B57DB ΔE 0.048
- Bright Blue #0165FC ΔE 0.055
- Mid Blue #276AB3 ΔE 0.062
- Electric Blue #0652FF ΔE 0.071
Use #1664D8 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.