#4781BB
Closest named color: Cool Blue (#4984B8). oklch(59% 0.108 250.1), rgb(71, 129, 187).
Aa
Black text reads best on this color (5.12:1).
About this color
#4781BB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.108 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.011 away. Black text reads best on it, at 5.12:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.108) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.12:1 |
| White text | 4.09:1 |
Values
| HEX | #4781BB |
| RGB | rgb(71, 129, 187) |
| HSL | hsl(210, 46%, 51%) |
| OKLCH | oklch(59% 0.108 250.1) |
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 #4781BB | 4.09:1 | AA large text | Lc -73.4 | Content text, not long reading |
| Black text on #4781BB | 5.12:1 | AA | Lc 36.2 | Non-text elements, placeholder text |
| #4781BB text on white | 4.09:1 | AA large text | Lc 67.9 | Content text, not long reading |
| #4781BB text on black | 5.12:1 | AA | Lc -33.7 | 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
#E3EBF3
oklch(93.6% 0.014 248)
-
Step 200
200
#CCDBEB
oklch(88.5% 0.027 249.9)
-
Step 300
300
#AAC4E0
oklch(81% 0.049 250.4)
-
Step 400
400
#7BA5D0
oklch(70.8% 0.078 249.6)
-
Step 500
500
#598EC4
oklch(63.2% 0.1 250.1)
-
Step 600
600 (this color)
#4781BB
oklch(59% 0.108 250.1)
-
Step 700
700
#2F6497
oklch(49.2% 0.1 249.8)
-
Step 800
800
#28517B
oklch(42.6% 0.084 250.9)
-
Step 900
900
#254463
oklch(37.8% 0.065 249.9)
-
Step 950
950
#16283A
oklch(27.1% 0.041 249.6)
#4781BB 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) | #6884BE | 0.039 |
| Deuteranopia (no green cones) | #5978BA | 0.029 |
| Tritanopia (no blue cones) | #008F96 | 0.087 |
| Achromatopsia (no color) | #7D7D7D | 0.108 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4781BB
#4781BB
oklch(59% 0.108 250.1)
- #A6712A
#A6712A
oklch(59.1% 0.108 70.4)
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 #4781BB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.011
- Steel Blue #4682B4 ΔE 0.012
- Off Blue #5684AE ΔE 0.028
- Windows Blue #3778BF ΔE 0.033
- Dusty Blue #5A86AD ΔE 0.035
- Water Blue #0E87CC ΔE 0.037
- Blue NCS #118AB2 ΔE 0.043
- Nice Blue #107AB0 ΔE 0.045
Use #4781BB 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.