#1E66BB
Closest named color: Mid Blue (#276AB3). oklch(51.4% 0.151 255.5), rgb(30, 102, 187).
Aa
White text reads best on this color (5.71:1).
About this color
#1E66BB is a medium-dark, vivid blue. In OKLCH its lightness is 51%, its chroma 0.151 and its hue 256°. 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 5.71:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.151) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.67:1 |
| White text | 5.71:1 |
Values
| HEX | #1E66BB |
| RGB | rgb(30, 102, 187) |
| HSL | hsl(212, 72%, 43%) |
| OKLCH | oklch(51.4% 0.151 255.5) |
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 #1E66BB | 5.71:1 | AA | Lc -83.4 | Fine for body text |
| Black text on #1E66BB | 3.67:1 | AA large text | Lc 26.0 | Dividers and decoration only |
| #1E66BB text on white | 5.71:1 | AA | Lc 78.1 | Fine for body text |
| #1E66BB text on black | 3.67:1 | AA large text | Lc -23.7 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF8
oklch(93.6% 0.021 254.9)
-
Step 200
200
#C8DBF4
oklch(88.5% 0.04 255.3)
-
Step 300
300
#A2C3F0
oklch(80.9% 0.073 256.2)
-
Step 400
400
#6EA3E8
oklch(70.7% 0.116 255.5)
-
Step 500
500
#458AE1
oklch(63% 0.149 255.4)
-
Step 600
600
#2372CF
oklch(55.6% 0.162 255.4)
-
Step 700
700 (this color)
#1E66BB
oklch(51.4% 0.151 255.5)
-
Step 800
800
#154E91
oklch(42.7% 0.125 255.4)
-
Step 900
900
#194274
oklch(37.8% 0.097 255.2)
-
Step 950
950
#102744
oklch(27.1% 0.062 255.3)
#1E66BB 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) | #386EBE | 0.032 |
| Deuteranopia (no green cones) | #1260B9 | 0.019 |
| Tritanopia (no blue cones) | #007A87 | 0.113 |
| Achromatopsia (no color) | #666666 | 0.151 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1E66BB
#1E66BB
oklch(51.4% 0.151 255.5)
- #8A5D00
#8A5D00
oklch(51.4% 0.108 76.1)
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 #1E66BB, 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 0.042
- Windows Blue #3778BF ΔE 0.056
- Flat Blue #3C73A8 ΔE 0.058
- Nice Blue #107AB0 ΔE 0.062
- Muted Blue #3B719F ΔE 0.064
- Peacock Blue #016795 ΔE 0.064
- Ocean Blue #03719C ΔE 0.064
Use #1E66BB 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.