#266CE9
Closest named color: Cerulean Blue (#056EEE). oklch(56.3% 0.202 261), rgb(38, 108, 233).
Aa
White text reads best on this color (4.76:1).
About this color
#266CE9 is a medium-dark, vivid blue. In OKLCH its lightness is 56%, its chroma 0.202 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean Blue (#056EEE), ΔE 0.013 away. White text reads best on it, at 4.76:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.202) |
| Temperature | cool |
| Nearest name | Cerulean Blue (#056EEE) |
| Black text | 4.40:1 |
| White text | 4.76:1 |
Values
| HEX | #266CE9 |
| RGB | rgb(38, 108, 233) |
| HSL | hsl(218, 82%, 53%) |
| OKLCH | oklch(56.3% 0.202 261) |
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 #266CE9 | 4.76:1 | AA | Lc -77.9 | Fine for body text |
| Black text on #266CE9 | 4.40:1 | AA large text | Lc 31.6 | Non-text elements, placeholder text |
| #266CE9 text on white | 4.76:1 | AA | Lc 72.4 | Content text, not long reading |
| #266CE9 text on black | 4.40:1 | AA large text | Lc -29.2 | 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
#E0EBFC
oklch(93.7% 0.026 259)
-
Step 200
200
#C7DAFB
oklch(88.5% 0.05 261.5)
-
Step 300
300
#A0C2FC
oklch(81% 0.09 260.9)
-
Step 400
400
#6B9FFA
oklch(70.6% 0.145 260.9)
-
Step 500
500
#4384F8
oklch(63.1% 0.186 260.9)
-
Step 600
600 (this color)
#266CE9
oklch(56.3% 0.202 261)
-
Step 700
700
#1757C9
oklch(49.1% 0.189 261.1)
-
Step 800
800
#1648A2
oklch(42.7% 0.155 261.1)
-
Step 900
900
#183E81
oklch(37.8% 0.121 260.8)
-
Step 950
950
#0F254B
oklch(27% 0.076 260.5)
#266CE9 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) | #007CED | 0.039 |
| Deuteranopia (no green cones) | #006AE7 | 0.016 |
| Tritanopia (no blue cones) | #008BA0 | 0.155 |
| Achromatopsia (no color) | #737373 | 0.202 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #266CE9
#266CE9
oklch(56.3% 0.202 261)
- #986D00
#986D00
oklch(56.4% 0.116 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 #266CE9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean Blue #056EEE ΔE 0.013
- Royal Blue #4169E1 ΔE 0.023
- Neon Blue #4361EE ΔE 0.032
- Bright Blue #0165FC ΔE 0.037
- Azul #1D5DEC ΔE 0.038
- Clear Blue #247AFD ΔE 0.044
- Warm Blue #4B57DB ΔE 0.056
- Electric Blue #0652FF ΔE 0.070
Use #266CE9 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.