#659CF4
Closest named color: Cornflower Blue (#6495ED). oklch(69.4% 0.143 259.4), rgb(101, 156, 244).
Aa
Black text reads best on this color (7.61:1).
About this color
#659CF4 is a medium-light, vivid blue. In OKLCH its lightness is 69%, its chroma 0.143 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.020 away. Black text reads best on it, at 7.61:1.
| Hue family | Blues |
| Lightness | medium-light (69%) |
| Chroma | vivid (0.143) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.61:1 |
| White text | 2.75:1 |
Values
| HEX | #659CF4 |
| RGB | rgb(101, 156, 244) |
| HSL | hsl(217, 87%, 68%) |
| OKLCH | oklch(69.4% 0.143 259.4) |
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 #659CF4 | 2.75:1 | Fails | Lc -58.3 | Large or bold text, headings |
| Black text on #659CF4 | 7.61:1 | AAA | Lc 51.0 | Large or bold text, headings |
| #659CF4 text on white | 2.75:1 | Fails | Lc 53.1 | Large or bold text, headings |
| #659CF4 text on black | 7.61:1 | AAA | Lc -48.8 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EBFC
oklch(93.7% 0.026 259)
-
Step 200
200
#C6DBFB
oklch(88.6% 0.05 258.7)
-
Step 300
300
#9EC2FB
oklch(80.9% 0.09 259.4)
-
Step 400
400 (this color)
#659CF4
oklch(69.4% 0.143 259.4)
-
Step 500
500
#3F85F5
oklch(63% 0.182 259.5)
-
Step 600
600
#1C6CE4
oklch(55.6% 0.197 259.4)
-
Step 700
700
#0D59C6
oklch(49.1% 0.184 259.4)
-
Step 800
800
#1049A0
oklch(42.6% 0.153 259.6)
-
Step 900
900
#153F7F
oklch(37.8% 0.118 259)
-
Step 950
950
#0E254B
oklch(27% 0.076 259.9)
#659CF4 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) | #77A3F8 | 0.029 |
| Deuteranopia (no green cones) | #6496F2 | 0.016 |
| Tritanopia (no blue cones) | #00B0BC | 0.124 |
| Achromatopsia (no color) | #9C9C9C | 0.143 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #659CF4
#659CF4
oklch(69.4% 0.143 259.4)
- #CB9006
#CB9006
oklch(69.3% 0.143 79.2)
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 #659CF4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.020
- Chefchaouen Blue #4895EF ΔE 0.035
- Periwinkle Blue #8F99FB ΔE 0.051
- Soft Blue #6488EA ΔE 0.052
- Dark Sky Blue #448EE4 ΔE 0.055
- Perrywinkle #8F8CE7 ΔE 0.060
- Lavender Blue #8B88F8 ΔE 0.065
- Dodger Blue #1E90FF ΔE 0.066
Use #659CF4 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.