#4666E9
Closest named color: Neon Blue (#4361EE). oklch(56.3% 0.201 268.7), rgb(70, 102, 233).
Aa
White text reads best on this color (4.84:1).
About this color
#4666E9 is a medium-dark, vivid blue. In OKLCH its lightness is 56%, its chroma 0.201 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Neon Blue (#4361EE), ΔE 0.015 away. White text reads best on it, at 4.84:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.201) |
| Temperature | cool |
| Nearest name | Neon Blue (#4361EE) |
| Black text | 4.33:1 |
| White text | 4.84:1 |
Values
| HEX | #4666E9 |
| RGB | rgb(70, 102, 233) |
| HSL | hsl(228, 79%, 59%) |
| OKLCH | oklch(56.3% 0.201 268.7) |
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 #4666E9 | 4.84:1 | AA | Lc -78.5 | Fine for body text |
| Black text on #4666E9 | 4.33:1 | AA large text | Lc 31.0 | Non-text elements, placeholder text |
| #4666E9 text on white | 4.84:1 | AA | Lc 73.1 | Content text, not long reading |
| #4666E9 text on black | 4.33:1 | AA large text | Lc -28.6 | 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 600.
-
Step 50
50
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E2EAFC
oklch(93.6% 0.026 266.6)
-
Step 200
200
#CBD9FB
oklch(88.6% 0.049 267.7)
-
Step 300
300
#A8BFFC
oklch(80.9% 0.09 268.4)
-
Step 400
400
#7B9BFB
oklch(70.7% 0.145 268.6)
-
Step 500
500
#5C7EF8
oklch(63% 0.186 268.9)
-
Step 600
600 (this color)
#4666E9
oklch(56.3% 0.201 268.7)
-
Step 700
700
#3752C9
oklch(49.2% 0.187 268.7)
-
Step 800
800
#2D44A2
oklch(42.7% 0.154 268.6)
-
Step 900
900
#283A81
oklch(37.7% 0.122 269.1)
-
Step 950
950
#17234B
oklch(27% 0.076 268.4)
#4666E9 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) | #0079ED | 0.052 |
| Deuteranopia (no green cones) | #006AE6 | 0.039 |
| Tritanopia (no blue cones) | #00869E | 0.161 |
| Achromatopsia (no color) | #727272 | 0.201 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4666E9
#4666E9
oklch(56.3% 0.201 268.7)
- #917000
#917000
oklch(56.2% 0.115 88.1)
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 #4666E9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Neon Blue #4361EE ΔE 0.015
- Royal Blue #4169E1 ΔE 0.015
- Cerulean Blue #056EEE ΔE 0.038
- Warm Blue #4B57DB ΔE 0.039
- Azul #1D5DEC ΔE 0.043
- Bright Blue #0165FC ΔE 0.048
- Dark Periwinkle #665FD1 ΔE 0.054
- Clear Blue #247AFD ΔE 0.055
Use #4666E9 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.