#6699EF
Closest named color: Cornflower Blue (#6495ED). oklch(68.5% 0.139 260.3), rgb(102, 153, 239).
Aa
Black text reads best on this color (7.36:1).
About this color
#6699EF is a medium-light, moderately saturated blue. In OKLCH its lightness is 69%, its chroma 0.139 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.011 away. Black text reads best on it, at 7.36:1.
| Hue family | Blues |
| Lightness | medium-light (69%) |
| Chroma | moderately saturated (0.139) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.36:1 |
| White text | 2.85:1 |
Values
| HEX | #6699EF |
| RGB | rgb(102, 153, 239) |
| HSL | hsl(218, 81%, 67%) |
| OKLCH | oklch(68.5% 0.139 260.3) |
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 #6699EF | 2.85:1 | Fails | Lc -59.7 | Large or bold text, headings |
| Black text on #6699EF | 7.36:1 | AAA | Lc 49.6 | Large or bold text, headings |
| #6699EF text on white | 2.85:1 | Fails | Lc 54.4 | Large or bold text, headings |
| #6699EF text on black | 7.36:1 | AAA | Lc -47.4 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EBFB
oklch(93.7% 0.025 257.6)
-
Step 200
200
#C7DAFA
oklch(88.4% 0.049 260.9)
-
Step 300
300
#A0C2F9
oklch(80.9% 0.087 259.9)
-
Step 400
400 (this color)
#6699EF
oklch(68.5% 0.139 260.3)
-
Step 500
500
#4585F3
oklch(63.1% 0.178 260.5)
-
Step 600
600
#256CE2
oklch(55.7% 0.193 260.3)
-
Step 700
700
#1859C4
oklch(49.1% 0.179 260.3)
-
Step 800
800
#17499E
oklch(42.6% 0.148 260.5)
-
Step 900
900
#193E7E
oklch(37.6% 0.117 260.6)
-
Step 950
950
#10254A
oklch(27% 0.074 260.8)
#6699EF 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) | #75A0F3 | 0.027 |
| Deuteranopia (no green cones) | #6493ED | 0.016 |
| Tritanopia (no blue cones) | #00ACB9 | 0.121 |
| Achromatopsia (no color) | #999999 | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6699EF
#6699EF
oklch(68.5% 0.139 260.3)
- #C68F0E
#C68F0E
oklch(68.6% 0.139 80.5)
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 #6699EF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.011
- Chefchaouen Blue #4895EF ΔE 0.031
- Soft Blue #6488EA ΔE 0.045
- Dark Sky Blue #448EE4 ΔE 0.048
- Periwinkle Blue #8F99FB ΔE 0.053
- Perrywinkle #8F8CE7 ΔE 0.056
- Lavender Blue #8B88F8 ΔE 0.062
- Dodger Blue #1E90FF ΔE 0.064
Use #6699EF 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.