#1E66E0
Closest named color: Cerulean Blue (#056EEE). oklch(54.2% 0.199 260.6), rgb(30, 102, 224).
Aa
White text reads best on this color (5.20:1).
About this color
#1E66E0 is a medium-dark, vivid blue. In OKLCH its lightness is 54%, its chroma 0.199 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean Blue (#056EEE), ΔE 0.028 away. White text reads best on it, at 5.20:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.199) |
| Temperature | cool |
| Nearest name | Cerulean Blue (#056EEE) |
| Black text | 4.03:1 |
| White text | 5.20:1 |
Values
| HEX | #1E66E0 |
| RGB | rgb(30, 102, 224) |
| HSL | hsl(218, 76%, 50%) |
| OKLCH | oklch(54.2% 0.199 260.6) |
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 #1E66E0 | 5.20:1 | AA | Lc -80.5 | Fine for body text |
| Black text on #1E66E0 | 4.03:1 | AA large text | Lc 28.9 | Dividers and decoration only |
| #1E66E0 text on white | 5.20:1 | AA | Lc 75.1 | Fine for body text |
| #1E66E0 text on black | 4.03:1 | AA large text | Lc -26.6 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EBFC
oklch(93.7% 0.026 259)
-
Step 200
200
#C7DAFB
oklch(88.5% 0.05 261.5)
-
Step 300
300
#A0C2FB
oklch(81% 0.089 260.6)
-
Step 400
400
#6BA0F9
oklch(70.8% 0.143 260.3)
-
Step 500
500
#4384F6
oklch(63% 0.183 260.7)
-
Step 600
600 (this color)
#1E66E0
oklch(54.2% 0.199 260.6)
-
Step 700
700
#1658C7
oklch(49.1% 0.185 260.6)
-
Step 800
800
#1549A1
oklch(42.8% 0.153 260.5)
-
Step 900
900
#183E80
oklch(37.7% 0.12 260.6)
-
Step 950
950
#0F254B
oklch(27% 0.076 260.5)
#1E66E0 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) | #0076E4 | 0.039 |
| Deuteranopia (no green cones) | #0064DE | 0.012 |
| Tritanopia (no blue cones) | #008599 | 0.153 |
| Achromatopsia (no color) | #6D6D6D | 0.199 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1E66E0
#1E66E0
oklch(54.2% 0.199 260.6)
- #906700
#906700
oklch(54.2% 0.112 81.1)
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 #1E66E0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean Blue #056EEE ΔE 0.028
- Azul #1D5DEC ΔE 0.028
- Royal Blue #4169E1 ΔE 0.029
- Neon Blue #4361EE ΔE 0.037
- Bright Blue #0165FC ΔE 0.043
- Warm Blue #4B57DB ΔE 0.047
- Clear Blue #247AFD ΔE 0.065
- Electric Blue #0652FF ΔE 0.065
Use #1E66E0 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.