#266EB3
Closest named color: Mid Blue (#276AB3). oklch(52.9% 0.129 251), rgb(38, 110, 179).
Aa
White text reads best on this color (5.29:1).
About this color
#266EB3 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 53%, its chroma 0.129 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.011 away. White text reads best on it, at 5.29:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.129) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.96:1 |
| White text | 5.29:1 |
Values
| HEX | #266EB3 |
| RGB | rgb(38, 110, 179) |
| HSL | hsl(209, 65%, 43%) |
| OKLCH | oklch(52.9% 0.129 251) |
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 #266EB3 | 5.29:1 | AA | Lc -81.3 | Fine for body text |
| Black text on #266EB3 | 3.96:1 | AA large text | Lc 28.1 | Dividers and decoration only |
| #266EB3 text on white | 5.29:1 | AA | Lc 76.0 | Fine for body text |
| #266EB3 text on black | 3.96:1 | AA large text | Lc -25.8 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E2EBF5
oklch(93.6% 0.017 250.8)
-
Step 200
200
#CADBEE
oklch(88.5% 0.032 251.1)
-
Step 300
300
#A5C4E6
oklch(80.9% 0.059 250.9)
-
Step 400
400
#74A5D9
oklch(70.8% 0.093 250.7)
-
Step 500
500
#4E8DCF
oklch(63.1% 0.12 251.2)
-
Step 600
600 (this color)
#266EB3
oklch(52.9% 0.129 251)
-
Step 700
700
#2163A2
oklch(49.1% 0.12 250.9)
-
Step 800
800
#1E5183
oklch(42.7% 0.099 251)
-
Step 900
900
#1E4369
oklch(37.6% 0.078 251.2)
-
Step 950
950
#13283E
oklch(27.1% 0.049 251.1)
#266EB3 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) | #4D72B6 | 0.038 |
| Deuteranopia (no green cones) | #3766B2 | 0.023 |
| Tritanopia (no blue cones) | #007E88 | 0.095 |
| Achromatopsia (no color) | #6B6B6B | 0.129 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #266EB3
#266EB3
oklch(52.9% 0.129 251)
- #945E00
#945E00
oklch(52.9% 0.114 70.8)
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 #266EB3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.011
- French Blue #436BAD ΔE 0.024
- Flat Blue #3C73A8 ΔE 0.031
- Nice Blue #107AB0 ΔE 0.036
- Windows Blue #3778BF ΔE 0.036
- Muted Blue #3B719F ΔE 0.038
- Ocean Blue #03719C ΔE 0.043
- Peacock Blue #016795 ΔE 0.054
Use #266EB3 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.