#4FA9FD
Closest named color: Cornflower Blue (#6495ED). oklch(71.7% 0.15 249.3), rgb(79, 169, 253).
Aa
Black text reads best on this color (8.42:1).
About this color
#4FA9FD is a medium-light, vivid blue. In OKLCH its lightness is 72%, its chroma 0.150 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.053 away. Black text reads best on it, at 8.42:1.
| Hue family | Blues |
| Lightness | medium-light (72%) |
| Chroma | vivid (0.150) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 8.42:1 |
| White text | 2.49:1 |
Values
| HEX | #4FA9FD |
| RGB | rgb(79, 169, 253) |
| HSL | hsl(209, 98%, 65%) |
| OKLCH | oklch(71.7% 0.15 249.3) |
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 #4FA9FD | 2.49:1 | Fails | Lc -53.7 | Large or bold text, headings |
| Black text on #4FA9FD | 8.42:1 | AAA | Lc 55.4 | Large or bold text, headings |
| #4FA9FD text on white | 2.49:1 | Fails | Lc 48.6 | Large or bold text, headings |
| #4FA9FD text on black | 8.42:1 | AAA | Lc -53.4 | Large or bold text, headings |
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 400.
-
Step 50
50
#EFF6FE
oklch(97% 0.013 251.6)
-
Step 100
100
#DDECFC
oklch(93.7% 0.027 249.9)
-
Step 200
200
#C0DDFB
oklch(88.6% 0.052 249.3)
-
Step 300
300
#91C6FB
oklch(80.9% 0.094 249)
-
Step 400
400 (this color)
#4FA9FD
oklch(71.7% 0.15 249.3)
-
Step 500
500
#008DEE
oklch(63.2% 0.176 249.3)
-
Step 600
600
#0076C9
oklch(55.6% 0.155 249.4)
-
Step 700
700
#0063AA
oklch(49.1% 0.137 249.4)
-
Step 800
800
#00518C
oklch(42.7% 0.118 249.2)
-
Step 900
900
#004376
oklch(37.6% 0.105 249.5)
-
Step 950
950
#002849
oklch(27.1% 0.074 248.8)
#4FA9FD 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) | #83ADFF | 0.052 |
| Deuteranopia (no green cones) | #6B9DFB | 0.036 |
| Tritanopia (no blue cones) | #00BDC7 | 0.114 |
| Achromatopsia (no color) | #A4A4A4 | 0.150 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4FA9FD
#4FA9FD
oklch(71.7% 0.15 249.3)
- #DF9019
#DF9019
oklch(71.7% 0.15 69.4)
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 #4FA9FD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.053
- Chefchaouen Blue #4895EF ΔE 0.055
- Deep Sky Blue #00BFFF ΔE 0.060
- Periwinkle Blue #8F99FB ΔE 0.072
- Carolina Blue #8AB8FE ΔE 0.074
- Dodger Blue #1E90FF ΔE 0.078
- Dark Sky Blue #448EE4 ΔE 0.078
- Soft Blue #6488EA ΔE 0.085
Use #4FA9FD 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.