#2666A8
Closest named color: Mid Blue (#276AB3). oklch(50.4% 0.123 252.2), rgb(38, 102, 168).
Aa
White text reads best on this color (5.91:1).
About this color
#2666A8 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 50%, its chroma 0.123 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.019 away. White text reads best on it, at 5.91:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.123) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.54:1 |
| White text | 5.91:1 |
Values
| HEX | #2666A8 |
| RGB | rgb(38, 102, 168) |
| HSL | hsl(210, 63%, 40%) |
| OKLCH | oklch(50.4% 0.123 252.2) |
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 #2666A8 | 5.91:1 | AA | Lc -84.5 | Fine for body text |
| Black text on #2666A8 | 3.54:1 | AA large text | Lc 24.8 | Dividers and decoration only |
| #2666A8 text on white | 5.91:1 | AA | Lc 79.2 | Fine for body text |
| #2666A8 text on black | 3.54:1 | AA large text | Lc -22.6 | 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 700.
-
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
#CADBEF
oklch(88.5% 0.033 252.5)
-
Step 300
300
#A5C4E7
oklch(80.9% 0.06 251.7)
-
Step 400
400
#74A4DB
oklch(70.6% 0.096 252.5)
-
Step 500
500
#4E8DD1
oklch(63.2% 0.122 251.9)
-
Step 600
600
#3075BE
oklch(55.5% 0.133 252.5)
-
Step 700
700 (this color)
#2666A8
oklch(50.4% 0.123 252.2)
-
Step 800
800
#1E5085
oklch(42.6% 0.103 252.6)
-
Step 900
900
#1F436A
oklch(37.7% 0.079 252.3)
-
Step 950
950
#13283E
oklch(27.1% 0.049 251.1)
#2666A8 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) | #476AAB | 0.035 |
| Deuteranopia (no green cones) | #325FA7 | 0.020 |
| Tritanopia (no blue cones) | #00767F | 0.093 |
| Achromatopsia (no color) | #646464 | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2666A8
#2666A8
oklch(50.4% 0.123 252.2)
- #895800
#895800
oklch(50.2% 0.108 72.1)
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 #2666A8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.019
- French Blue #436BAD ΔE 0.032
- Peacock Blue #016795 ΔE 0.036
- Ocean Blue #03719C ΔE 0.042
- Dusky Blue #475F94 ΔE 0.042
- Denim Blue #3B5B92 ΔE 0.043
- Muted Blue #3B719F ΔE 0.043
- Flat Blue #3C73A8 ΔE 0.045
Use #2666A8 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.