#2666F9
Closest named color: Bright Blue (#0165FC). oklch(56.4% 0.229 263.2), rgb(38, 102, 249).
Aa
White text reads best on this color (4.82:1).
About this color
#2666F9 is a medium-dark, vivid blue. In OKLCH its lightness is 56%, its chroma 0.229 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Bright Blue (#0165FC), ΔE 0.014 away. White text reads best on it, at 4.82:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.229) |
| Temperature | cool |
| Nearest name | Bright Blue (#0165FC) |
| Black text | 4.35:1 |
| White text | 4.82:1 |
Values
| HEX | #2666F9 |
| RGB | rgb(38, 102, 249) |
| HSL | hsl(222, 95%, 56%) |
| OKLCH | oklch(56.4% 0.229 263.2) |
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 #2666F9 | 4.82:1 | AA | Lc -78.1 | Fine for body text |
| Black text on #2666F9 | 4.35:1 | AA large text | Lc 31.4 | Non-text elements, placeholder text |
| #2666F9 text on white | 4.82:1 | AA | Lc 72.7 | Content text, not long reading |
| #2666F9 text on black | 4.35:1 | AA large text | Lc -29.0 | 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
#F1F6FF
oklch(97.2% 0.013 262.4)
-
Step 100
100
#E0EAFF
oklch(93.6% 0.03 265.3)
-
Step 200
200
#C6DAFF
oklch(88.5% 0.056 262.8)
-
Step 300
300
#A0C1FF
oklch(80.9% 0.095 262.7)
-
Step 400
400
#6D9DFF
oklch(70.6% 0.153 263.3)
-
Step 500
500
#4681FF
oklch(63.1% 0.198 263.1)
-
Step 600
600 (this color)
#2666F9
oklch(56.4% 0.229 263.2)
-
Step 700
700
#1851D7
oklch(49.2% 0.213 263.3)
-
Step 800
800
#1643AD
oklch(42.6% 0.176 263.4)
-
Step 900
900
#183B89
oklch(37.8% 0.137 263.2)
-
Step 950
950
#0E2350
oklch(26.9% 0.087 263)
#2666F9 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) | #007CFE | 0.051 |
| Deuteranopia (no green cones) | #0068F6 | 0.014 |
| Tritanopia (no blue cones) | #008CA6 | 0.176 |
| Achromatopsia (no color) | #727272 | 0.229 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2666F9
#2666F9
oklch(56.4% 0.229 263.2)
- #966E00
#966E00
oklch(56.4% 0.116 83.3)
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 #2666F9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bright Blue #0165FC ΔE 0.014
- Cerulean Blue #056EEE ΔE 0.026
- Neon Blue #4361EE ΔE 0.028
- Azul #1D5DEC ΔE 0.030
- Royal Blue #4169E1 ΔE 0.043
- Clear Blue #247AFD ΔE 0.048
- Electric Blue #0652FF ΔE 0.048
- Warm Blue #4B57DB ΔE 0.061
Use #2666F9 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.