#4181BD
Closest named color: Cool Blue (#4984B8). oklch(58.8% 0.114 249), rgb(65, 129, 189).
Aa
Black text reads best on this color (5.09:1).
About this color
#4181BD is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.114 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.015 away. Black text reads best on it, at 5.09:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.114) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.09:1 |
| White text | 4.11:1 |
Values
| HEX | #4181BD |
| RGB | rgb(65, 129, 189) |
| HSL | hsl(209, 49%, 50%) |
| OKLCH | oklch(58.8% 0.114 249) |
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 #4181BD | 4.11:1 | AA large text | Lc -73.6 | Content text, not long reading |
| Black text on #4181BD | 5.09:1 | AA | Lc 36.0 | Non-text elements, placeholder text |
| #4181BD text on white | 4.11:1 | AA large text | Lc 68.1 | Content text, not long reading |
| #4181BD text on black | 5.09:1 | AA | Lc -33.6 | 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 600.
-
Step 50
50
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EBF4
oklch(93.7% 0.015 251.2)
-
Step 200
200
#CBDBEC
oklch(88.5% 0.029 249.8)
-
Step 300
300
#A8C4E1
oklch(80.9% 0.051 249.4)
-
Step 400
400
#78A5D2
oklch(70.7% 0.082 249.1)
-
Step 500
500
#548EC6
oklch(63.1% 0.105 249)
-
Step 600
600 (this color)
#4181BD
oklch(58.8% 0.114 249)
-
Step 700
700
#29649A
oklch(49.1% 0.106 249.2)
-
Step 800
800
#23527D
oklch(42.8% 0.088 248.9)
-
Step 900
900
#224464
oklch(37.7% 0.068 248.8)
-
Step 950
950
#15283B
oklch(27.1% 0.044 249.7)
#4181BD 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) | #6784C0 | 0.042 |
| Deuteranopia (no green cones) | #5678BC | 0.030 |
| Tritanopia (no blue cones) | #008F96 | 0.088 |
| Achromatopsia (no color) | #7D7D7D | 0.114 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4181BD
#4181BD
oklch(58.8% 0.114 249)
- #A86F23
#A86F23
oklch(58.9% 0.114 69.2)
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 #4181BD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.015
- Steel Blue #4682B4 ΔE 0.015
- Windows Blue #3778BF ΔE 0.029
- Water Blue #0E87CC ΔE 0.032
- Off Blue #5684AE ΔE 0.033
- Dusty Blue #5A86AD ΔE 0.040
- Blue NCS #118AB2 ΔE 0.041
- Nice Blue #107AB0 ΔE 0.042
Use #4181BD 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.