#1766E8
Closest named color: Cerulean Blue (#056EEE). oklch(54.7% 0.21 260.5), rgb(23, 102, 232).
Aa
White text reads best on this color (5.11:1).
About this color
#1766E8 is a medium-dark, vivid blue. In OKLCH its lightness is 55%, its chroma 0.210 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean Blue (#056EEE), ΔE 0.021 away. White text reads best on it, at 5.11:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.210) |
| Temperature | cool |
| Nearest name | Cerulean Blue (#056EEE) |
| Black text | 4.10:1 |
| White text | 5.11:1 |
Values
| HEX | #1766E8 |
| RGB | rgb(23, 102, 232) |
| HSL | hsl(217, 82%, 50%) |
| OKLCH | oklch(54.7% 0.21 260.5) |
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 #1766E8 | 5.11:1 | AA | Lc -79.9 | Fine for body text |
| Black text on #1766E8 | 4.10:1 | AA large text | Lc 29.6 | Dividers and decoration only |
| #1766E8 text on white | 5.11:1 | AA | Lc 74.5 | Content text, not long reading |
| #1766E8 text on black | 4.10:1 | AA large text | Lc -27.2 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EBFD
oklch(93.7% 0.027 260.3)
-
Step 200
200
#C6DAFD
oklch(88.5% 0.053 261.7)
-
Step 300
300
#9EC2FE
oklch(81% 0.094 260.4)
-
Step 400
400
#689FFE
oklch(70.7% 0.151 260.7)
-
Step 500
500
#3E83FC
oklch(63% 0.194 260.7)
-
Step 600
600 (this color)
#1766E8
oklch(54.7% 0.21 260.5)
-
Step 700
700
#0C56CD
oklch(49% 0.196 260.6)
-
Step 800
800
#0F48A5
oklch(42.8% 0.161 260.4)
-
Step 900
900
#153D83
oklch(37.6% 0.126 260.7)
-
Step 950
950
#0D254D
oklch(27.1% 0.08 260.1)
#1766E8 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) | #0077EC | 0.041 |
| Deuteranopia (no green cones) | #0065E6 | 0.008 |
| Tritanopia (no blue cones) | #00879D | 0.160 |
| Achromatopsia (no color) | #6E6E6E | 0.210 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1766E8
#1766E8
oklch(54.7% 0.21 260.5)
- #926800
#926800
oklch(54.6% 0.113 80.7)
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 #1766E8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean Blue #056EEE ΔE 0.021
- Azul #1D5DEC ΔE 0.021
- Bright Blue #0165FC ΔE 0.031
- Royal Blue #4169E1 ΔE 0.033
- Neon Blue #4361EE ΔE 0.033
- Warm Blue #4B57DB ΔE 0.051
- Electric Blue #0652FF ΔE 0.056
- Clear Blue #247AFD ΔE 0.059
Use #1766E8 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.