#266DCF
Closest named color: Royal Blue (#4169E1). oklch(54.5% 0.167 257.7), rgb(38, 109, 207).
Aa
White text reads best on this color (5.03:1).
About this color
#266DCF is a medium-dark, vivid blue. In OKLCH its lightness is 55%, its chroma 0.167 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.037 away. White text reads best on it, at 5.03:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.167) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.17:1 |
| White text | 5.03:1 |
Values
| HEX | #266DCF |
| RGB | rgb(38, 109, 207) |
| HSL | hsl(215, 69%, 48%) |
| OKLCH | oklch(54.5% 0.167 257.7) |
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 #266DCF | 5.03:1 | AA | Lc -79.7 | Fine for body text |
| Black text on #266DCF | 4.17:1 | AA large text | Lc 29.8 | Dividers and decoration only |
| #266DCF text on white | 5.03:1 | AA | Lc 74.3 | Content text, not long reading |
| #266DCF text on black | 4.17:1 | AA large text | Lc -27.4 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF9
oklch(93.7% 0.022 256.7)
-
Step 200
200
#C8DBF5
oklch(88.5% 0.041 256.2)
-
Step 300
300
#A3C3F1
oklch(81% 0.074 257.4)
-
Step 400
400
#70A2EB
oklch(70.7% 0.12 257.8)
-
Step 500
500
#4989E5
oklch(63.2% 0.154 257.7)
-
Step 600
600 (this color)
#266DCF
oklch(54.5% 0.167 257.7)
-
Step 700
700
#1C5DB6
oklch(49% 0.155 257.8)
-
Step 800
800
#1A4D94
oklch(42.8% 0.129 257.8)
-
Step 900
900
#1B4176
oklch(37.8% 0.1 257.4)
-
Step 950
950
#112645
oklch(27% 0.064 258.1)
#266DCF 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) | #3577D3 | 0.031 |
| Deuteranopia (no green cones) | #0068CD | 0.022 |
| Tritanopia (no blue cones) | #008594 | 0.128 |
| Achromatopsia (no color) | #6F6F6F | 0.167 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #266DCF
#266DCF
oklch(54.5% 0.167 257.7)
- #946600
#946600
oklch(54.5% 0.114 77.8)
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 #266DCF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.037
- Mid Blue #276AB3 ΔE 0.044
- Windows Blue #3778BF ΔE 0.045
- Cerulean Blue #056EEE ΔE 0.048
- French Blue #436BAD ΔE 0.056
- Neon Blue #4361EE ΔE 0.061
- Azul #1D5DEC ΔE 0.062
- Warm Blue #4B57DB ΔE 0.062
Use #266DCF 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.