#4B81DF
Closest named color: Dark Sky Blue (#448EE4). oklch(61.2% 0.154 260.7), rgb(75, 129, 223).
Aa
Black text reads best on this color (5.50:1).
About this color
#4B81DF is a medium-dark, vivid blue. In OKLCH its lightness is 61%, its chroma 0.154 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.034 away. Black text reads best on it, at 5.50:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | vivid (0.154) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 5.50:1 |
| White text | 3.81:1 |
Values
| HEX | #4B81DF |
| RGB | rgb(75, 129, 223) |
| HSL | hsl(218, 70%, 58%) |
| OKLCH | oklch(61.2% 0.154 260.7) |
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 #4B81DF | 3.81:1 | AA large text | Lc -70.9 | Content text, not long reading |
| Black text on #4B81DF | 5.50:1 | AA | Lc 38.7 | Non-text elements, placeholder text |
| #4B81DF text on white | 3.81:1 | AA large text | Lc 65.4 | Content text, not long reading |
| #4B81DF text on black | 5.50:1 | AA | Lc -36.3 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EAF9
oklch(93.5% 0.022 263.2)
-
Step 200
200
#CADAF6
oklch(88.5% 0.042 261.7)
-
Step 300
300
#A5C2F2
oklch(80.9% 0.075 260.4)
-
Step 400
400
#75A1EC
oklch(70.8% 0.121 260.6)
-
Step 500
500 (this color)
#4B81DF
oklch(61.2% 0.154 260.7)
-
Step 600
600
#356ED3
oklch(55.5% 0.167 260.8)
-
Step 700
700
#275CB7
oklch(49.2% 0.155 260.5)
-
Step 800
800
#224B94
oklch(42.6% 0.129 260.9)
-
Step 900
900
#204076
oklch(37.8% 0.1 260.2)
-
Step 950
950
#132645
oklch(27.1% 0.063 259.7)
#4B81DF 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) | #558AE3 | 0.027 |
| Deuteranopia (no green cones) | #3D7CDD | 0.020 |
| Tritanopia (no blue cones) | #0097A5 | 0.126 |
| Achromatopsia (no color) | #838383 | 0.154 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4B81DF
#4B81DF
oklch(61.2% 0.154 260.7)
- #AA7A00
#AA7A00
oklch(61.2% 0.126 81)
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 #4B81DF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.034
- Soft Blue #6488EA ΔE 0.038
- Water Blue #0E87CC ΔE 0.050
- Chefchaouen Blue #4895EF ΔE 0.054
- Cornflower #6A79F7 ΔE 0.055
- Windows Blue #3778BF ΔE 0.057
- Clear Blue #247AFD ΔE 0.058
- Dodger Blue #1E90FF ΔE 0.058
Use #4B81DF 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.