#4F8FDF
Closest named color: Dark Sky Blue (#448EE4). oklch(64.4% 0.138 255), rgb(79, 143, 223).
Aa
Black text reads best on this color (6.32:1).
About this color
#4F8FDF is a medium-light, moderately saturated blue. In OKLCH its lightness is 64%, its chroma 0.138 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.012 away. Black text reads best on it, at 6.32:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.138) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 6.32:1 |
| White text | 3.31:1 |
Values
| HEX | #4F8FDF |
| RGB | rgb(79, 143, 223) |
| HSL | hsl(213, 69%, 59%) |
| OKLCH | oklch(64.4% 0.138 255) |
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 #4F8FDF | 3.31:1 | AA large text | Lc -65.8 | Content text, not long reading |
| Black text on #4F8FDF | 6.32:1 | AA | Lc 43.7 | Non-text elements, placeholder text |
| #4F8FDF text on white | 3.31:1 | AA large text | Lc 60.3 | Content text, not long reading |
| #4F8FDF text on black | 6.32:1 | AA | Lc -41.4 | 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
#A4C3EC
oklch(80.9% 0.067 255.5)
-
Step 400
400
#72A3E3
oklch(70.7% 0.108 255.5)
-
Step 500
500 (this color)
#4F8FDF
oklch(64.4% 0.138 255)
-
Step 600
600
#2C73C8
oklch(55.6% 0.149 255.1)
-
Step 700
700
#1E60AD
oklch(49.1% 0.139 255.1)
-
Step 800
800
#1B4F8C
oklch(42.7% 0.115 254.8)
-
Step 900
900
#1D4270
oklch(37.7% 0.09 255.2)
-
Step 950
950
#122742
oklch(27.1% 0.057 255.5)
#4F8FDF 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) | #6C94E2 | 0.035 |
| Deuteranopia (no green cones) | #5887DD | 0.021 |
| Tritanopia (no blue cones) | #00A1AC | 0.111 |
| Achromatopsia (no color) | #8D8D8D | 0.138 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4F8FDF
#4F8FDF
oklch(64.4% 0.138 255)
- #BD7F00
#BD7F00
oklch(64.4% 0.136 74.7)
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 #4F8FDF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.012
- Chefchaouen Blue #4895EF ΔE 0.026
- Soft Blue #6488EA ΔE 0.033
- Cornflower Blue #6495ED ΔE 0.034
- Dodger Blue #1E90FF ΔE 0.053
- Water Blue #0E87CC ΔE 0.055
- Faded Blue #658CBB ΔE 0.056
- Cool Blue #4984B8 ΔE 0.063
Use #4F8FDF 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.