#4181C8
Closest named color: Water Blue (#0E87CC). oklch(59.4% 0.127 252.8), rgb(65, 129, 200).
Aa
Black text reads best on this color (5.19:1).
About this color
#4181C8 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.127 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.027 away. Black text reads best on it, at 5.19:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.127) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.19:1 |
| White text | 4.03:1 |
Values
| HEX | #4181C8 |
| RGB | rgb(65, 129, 200) |
| HSL | hsl(212, 55%, 52%) |
| OKLCH | oklch(59.4% 0.127 252.8) |
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 #4181C8 | 4.03:1 | AA large text | Lc -72.9 | Content text, not long reading |
| Black text on #4181C8 | 5.19:1 | AA | Lc 36.7 | Non-text elements, placeholder text |
| #4181C8 text on white | 4.03:1 | AA large text | Lc 67.4 | Content text, not long reading |
| #4181C8 text on black | 5.19:1 | AA | Lc -34.3 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E2EBF6
oklch(93.7% 0.018 253.3)
-
Step 200
200
#C9DBF0
oklch(88.4% 0.035 252.3)
-
Step 300
300
#A4C4E9
oklch(80.9% 0.063 252.3)
-
Step 400
400
#73A4DD
oklch(70.7% 0.099 252.9)
-
Step 500
500 (this color)
#4181C8
oklch(59.4% 0.127 252.8)
-
Step 600
600
#2D75C1
oklch(55.6% 0.138 252.7)
-
Step 700
700
#1F62A7
oklch(49.1% 0.129 252.7)
-
Step 800
800
#1C5087
oklch(42.7% 0.106 252.8)
-
Step 900
900
#1D436C
oklch(37.7% 0.083 252.4)
-
Step 950
950
#12273F
oklch(26.9% 0.053 253.1)
#4181C8 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) | #6185CB | 0.036 |
| Deuteranopia (no green cones) | #4E79C7 | 0.023 |
| Tritanopia (no blue cones) | #00929B | 0.101 |
| Achromatopsia (no color) | #7E7E7E | 0.127 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4181C8
#4181C8
oklch(59.4% 0.127 252.8)
- #AC7000
#AC7000
oklch(59.4% 0.127 72.3)
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 #4181C8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.027
- Cool Blue #4984B8 ΔE 0.029
- Windows Blue #3778BF ΔE 0.029
- Steel Blue #4682B4 ΔE 0.032
- Off Blue #5684AE ΔE 0.047
- Dark Sky Blue #448EE4 ΔE 0.051
- Nice Blue #107AB0 ΔE 0.052
- Dusty Blue #5A86AD ΔE 0.053
Use #4181C8 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.