#1266E3
Closest named color: Cerulean Blue (#056EEE). oklch(54.2% 0.205 259.7), rgb(18, 102, 227).
Aa
White text reads best on this color (5.20:1).
About this color
#1266E3 is a medium-dark, vivid blue. In OKLCH its lightness is 54%, its chroma 0.205 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean Blue (#056EEE), ΔE 0.025 away. White text reads best on it, at 5.20:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.205) |
| Temperature | cool |
| Nearest name | Cerulean Blue (#056EEE) |
| Black text | 4.03:1 |
| White text | 5.20:1 |
Values
| HEX | #1266E3 |
| RGB | rgb(18, 102, 227) |
| HSL | hsl(216, 85%, 48%) |
| OKLCH | oklch(54.2% 0.205 259.7) |
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 #1266E3 | 5.20:1 | AA | Lc -80.4 | Fine for body text |
| Black text on #1266E3 | 4.03:1 | AA large text | Lc 29.1 | Dividers and decoration only |
| #1266E3 text on white | 5.20:1 | AA | Lc 75.0 | Fine for body text |
| #1266E3 text on black | 4.03:1 | AA large text | Lc -26.7 | 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
#E0EBFC
oklch(93.7% 0.026 259)
-
Step 200
200
#C6DAFC
oklch(88.4% 0.052 261.1)
-
Step 300
300
#9EC2FC
oklch(80.9% 0.091 259.8)
-
Step 400
400
#68A0FB
oklch(70.7% 0.146 259.7)
-
Step 500
500
#3D85F9
oklch(63.2% 0.188 259.6)
-
Step 600
600 (this color)
#1266E3
oklch(54.2% 0.205 259.7)
-
Step 700
700
#0958CA
oklch(49.2% 0.19 259.7)
-
Step 800
800
#0D49A3
oklch(42.8% 0.157 259.6)
-
Step 900
900
#143E81
oklch(37.7% 0.122 259.7)
-
Step 950
950
#0D254C
oklch(27% 0.078 259.7)
#1266E3 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) | #0076E7 | 0.040 |
| Deuteranopia (no green cones) | #0064E1 | 0.008 |
| Tritanopia (no blue cones) | #00869A | 0.157 |
| Achromatopsia (no color) | #6D6D6D | 0.205 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1266E3
#1266E3
oklch(54.2% 0.205 259.7)
- #916600
#916600
oklch(54.1% 0.112 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 #1266E3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean Blue #056EEE ΔE 0.025
- Azul #1D5DEC ΔE 0.025
- Royal Blue #4169E1 ΔE 0.033
- Neon Blue #4361EE ΔE 0.038
- Bright Blue #0165FC ΔE 0.038
- Warm Blue #4B57DB ΔE 0.051
- Electric Blue #0652FF ΔE 0.061
- Clear Blue #247AFD ΔE 0.064
Use #1266E3 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.