#2366E2
Closest named color: Cerulean Blue (#056EEE). oklch(54.4% 0.201 261.4), rgb(35, 102, 226).
Aa
White text reads best on this color (5.15:1).
About this color
#2366E2 is a medium-dark, vivid blue. In OKLCH its lightness is 54%, its chroma 0.201 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean Blue (#056EEE), ΔE 0.026 away. White text reads best on it, at 5.15:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.201) |
| Temperature | cool |
| Nearest name | Cerulean Blue (#056EEE) |
| Black text | 4.07:1 |
| White text | 5.15:1 |
Values
| HEX | #2366E2 |
| RGB | rgb(35, 102, 226) |
| HSL | hsl(219, 77%, 51%) |
| OKLCH | oklch(54.4% 0.201 261.4) |
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 #2366E2 | 5.15:1 | AA | Lc -80.3 | Fine for body text |
| Black text on #2366E2 | 4.07:1 | AA large text | Lc 29.2 | Dividers and decoration only |
| #2366E2 text on white | 5.15:1 | AA | Lc 74.9 | Content text, not long reading |
| #2366E2 text on black | 4.07:1 | AA large text | Lc -26.8 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EAFC
oklch(93.5% 0.027 262.3)
-
Step 200
200
#C7DAFB
oklch(88.5% 0.05 261.5)
-
Step 300
300
#A0C1FC
oklch(80.8% 0.091 261.8)
-
Step 400
400
#6C9FFA
oklch(70.7% 0.145 261.3)
-
Step 500
500
#4584F7
oklch(63.1% 0.184 261.2)
-
Step 600
600 (this color)
#2366E2
oklch(54.4% 0.201 261.4)
-
Step 700
700
#1A57C8
oklch(49.1% 0.187 261.5)
-
Step 800
800
#1848A2
oklch(42.7% 0.155 261.5)
-
Step 900
900
#1A3E80
oklch(37.8% 0.119 261.3)
-
Step 950
950
#10254B
oklch(27.1% 0.076 261.2)
#2366E2 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) | #0076E6 | 0.039 |
| Deuteranopia (no green cones) | #0065E0 | 0.014 |
| Tritanopia (no blue cones) | #00859A | 0.154 |
| Achromatopsia (no color) | #6D6D6D | 0.201 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2366E2
#2366E2
oklch(54.4% 0.201 261.4)
- #916800
#916800
oklch(54.5% 0.113 81.4)
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 #2366E2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean Blue #056EEE ΔE 0.026
- Royal Blue #4169E1 ΔE 0.026
- Azul #1D5DEC ΔE 0.027
- Neon Blue #4361EE ΔE 0.033
- Bright Blue #0165FC ΔE 0.040
- Warm Blue #4B57DB ΔE 0.045
- Clear Blue #247AFD ΔE 0.063
- Electric Blue #0652FF ΔE 0.064
Use #2366E2 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.