#669FFC
Closest named color: Cornflower Blue (#6495ED). oklch(70.5% 0.15 259.7), rgb(102, 159, 252).
Aa
Black text reads best on this color (7.92:1).
About this color
#669FFC is a medium-light, vivid blue. In OKLCH its lightness is 70%, its chroma 0.150 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.032 away. Black text reads best on it, at 7.92:1.
| Hue family | Blues |
| Lightness | medium-light (70%) |
| Chroma | vivid (0.150) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.92:1 |
| White text | 2.64:1 |
Values
| HEX | #669FFC |
| RGB | rgb(102, 159, 252) |
| HSL | hsl(217, 96%, 69%) |
| OKLCH | oklch(70.5% 0.15 259.7) |
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 #669FFC | 2.64:1 | Fails | Lc -56.5 | Large or bold text, headings |
| Black text on #669FFC | 7.92:1 | AAA | Lc 52.7 | Large or bold text, headings |
| #669FFC text on white | 2.64:1 | Fails | Lc 51.3 | Large or bold text, headings |
| #669FFC text on black | 7.92:1 | AAA | Lc -50.6 | 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
#DFEBFD
oklch(93.6% 0.028 258.4)
-
Step 200
200
#C5DAFC
oklch(88.4% 0.052 260)
-
Step 300
300
#9DC2FD
oklch(80.9% 0.093 259.6)
-
Step 400
400 (this color)
#669FFC
oklch(70.5% 0.15 259.7)
-
Step 500
500
#3B84FB
oklch(63.1% 0.192 259.8)
-
Step 600
600
#166AEA
oklch(55.6% 0.208 259.8)
-
Step 700
700
#0557CB
oklch(49% 0.193 259.8)
-
Step 800
800
#0B48A4
oklch(42.6% 0.16 259.8)
-
Step 900
900
#133E82
oklch(37.7% 0.124 259.6)
-
Step 950
950
#0D254C
oklch(27% 0.078 259.7)
#669FFC 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) | #77A7FF | 0.030 |
| Deuteranopia (no green cones) | #6399FA | 0.016 |
| Tritanopia (no blue cones) | #00B4C1 | 0.129 |
| Achromatopsia (no color) | #9F9F9F | 0.150 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #669FFC
#669FFC
oklch(70.5% 0.15 259.7)
- #CF9400
#CF9400
oklch(70.6% 0.146 80.1)
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 #669FFC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.032
- Chefchaouen Blue #4895EF ΔE 0.044
- Periwinkle Blue #8F99FB ΔE 0.048
- Soft Blue #6488EA ΔE 0.062
- Perrywinkle #8F8CE7 ΔE 0.066
- Dark Sky Blue #448EE4 ΔE 0.066
- Lavender Blue #8B88F8 ΔE 0.067
- Dodger Blue #1E90FF ΔE 0.069
Use #669FFC 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.