#4181D1
Closest named color: Water Blue (#0E87CC). oklch(60% 0.139 255.2), rgb(65, 129, 209).
Aa
Black text reads best on this color (5.28:1).
About this color
#4181D1 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 60%, its chroma 0.139 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.030 away. Black text reads best on it, at 5.28:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.139) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.28:1 |
| White text | 3.97:1 |
Values
| HEX | #4181D1 |
| RGB | rgb(65, 129, 209) |
| HSL | hsl(213, 61%, 54%) |
| OKLCH | oklch(60% 0.139 255.2) |
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 #4181D1 | 3.97:1 | AA large text | Lc -72.3 | Content text, not long reading |
| Black text on #4181D1 | 5.28:1 | AA | Lc 37.3 | Non-text elements, placeholder text |
| #4181D1 text on white | 3.97:1 | AA large text | Lc 66.8 | Content text, not long reading |
| #4181D1 text on black | 5.28:1 | AA | Lc -34.9 | Non-text elements, placeholder text |
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 500.
-
Step 50
50
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF7
oklch(93.6% 0.019 252.9)
-
Step 200
200
#C9DBF2
oklch(88.5% 0.037 254.6)
-
Step 300
300
#A4C3ED
oklch(80.9% 0.069 256.1)
-
Step 400
400
#71A3E3
oklch(70.6% 0.109 255)
-
Step 500
500 (this color)
#4181D1
oklch(60% 0.139 255.2)
-
Step 600
600
#2B73C9
oklch(55.6% 0.151 255.2)
-
Step 700
700
#1D60AE
oklch(49.1% 0.141 255.2)
-
Step 800
800
#1B4F8D
oklch(42.8% 0.116 255.1)
-
Step 900
900
#1C4270
oklch(37.7% 0.09 254.8)
-
Step 950
950
#122742
oklch(27.1% 0.057 255.5)
#4181D1 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) | #5D87D4 | 0.034 |
| Deuteranopia (no green cones) | #4779CF | 0.021 |
| Tritanopia (no blue cones) | #00949F | 0.110 |
| Achromatopsia (no color) | #808080 | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4181D1
#4181D1
oklch(60% 0.139 255.2)
- #AB7300
#AB7300
oklch(59.9% 0.126 75.1)
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 #4181D1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.030
- Windows Blue #3778BF ΔE 0.037
- Cool Blue #4984B8 ΔE 0.042
- Dark Sky Blue #448EE4 ΔE 0.042
- Steel Blue #4682B4 ΔE 0.046
- Soft Blue #6488EA ΔE 0.057
- Off Blue #5684AE ΔE 0.059
- Nice Blue #107AB0 ΔE 0.063
Use #4181D1 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.