#6699DA
Closest named color: Cornflower Blue (#6495ED). oklch(67.4% 0.111 255), rgb(102, 153, 218).
Aa
Black text reads best on this color (7.13:1).
About this color
#6699DA is a medium-light, moderately saturated blue. In OKLCH its lightness is 67%, its chroma 0.111 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.033 away. Black text reads best on it, at 7.13:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.111) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.13:1 |
| White text | 2.94:1 |
Values
| HEX | #6699DA |
| RGB | rgb(102, 153, 218) |
| HSL | hsl(214, 61%, 63%) |
| OKLCH | oklch(67.4% 0.111 255) |
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 #6699DA | 2.94:1 | Fails | Lc -61.1 | Content text, not long reading |
| Black text on #6699DA | 7.13:1 | AAA | Lc 48.3 | Large or bold text, headings |
| #6699DA text on white | 2.94:1 | Fails | Lc 55.8 | Large or bold text, headings |
| #6699DA text on black | 7.13:1 | AAA | Lc -46.0 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF8
oklch(93.6% 0.021 254.9)
-
Step 200
200
#C8DBF3
oklch(88.5% 0.039 254.3)
-
Step 300
300
#A3C3EE
oklch(80.9% 0.07 255.9)
-
Step 400
400 (this color)
#6699DA
oklch(67.4% 0.111 255)
-
Step 500
500
#488BDD
oklch(63.1% 0.142 254.8)
-
Step 600
600
#2773CB
oklch(55.6% 0.155 254.9)
-
Step 700
700
#1960B0
oklch(49.2% 0.144 255)
-
Step 800
800
#184F8E
oklch(42.8% 0.119 254.7)
-
Step 900
900
#1B4272
oklch(37.8% 0.093 255.2)
-
Step 950
950
#112742
oklch(27% 0.058 254.7)
#6699DA 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) | #7F9DDD | 0.032 |
| Deuteranopia (no green cones) | #7091D9 | 0.023 |
| Tritanopia (no blue cones) | #23A8B0 | 0.099 |
| Achromatopsia (no color) | #969696 | 0.111 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6699DA
#6699DA
oklch(67.4% 0.111 255)
- #BE8C3F
#BE8C3F
oklch(67.4% 0.111 75.5)
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 #6699DA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.033
- Chefchaouen Blue #4895EF ΔE 0.044
- Dark Sky Blue #448EE4 ΔE 0.051
- Faded Blue #658CBB ΔE 0.052
- Soft Blue #6488EA ΔE 0.057
- Perrywinkle #8F8CE7 ΔE 0.064
- Greyblue #77A1B5 ΔE 0.068
- Periwinkle Blue #8F99FB ΔE 0.072
Use #6699DA 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.