#6699CD
Closest named color: Faded Blue (#658CBB). oklch(66.8% 0.095 249.9), rgb(102, 153, 205).
Aa
Black text reads best on this color (7.00:1).
About this color
#6699CD is a medium-light, moderately saturated blue. In OKLCH its lightness is 67%, its chroma 0.095 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.040 away. Black text reads best on it, at 7.00:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.095) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 7.00:1 |
| White text | 2.99:1 |
Values
| HEX | #6699CD |
| RGB | rgb(102, 153, 205) |
| HSL | hsl(210, 51%, 60%) |
| OKLCH | oklch(66.8% 0.095 249.9) |
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 #6699CD | 2.99:1 | Fails | Lc -61.9 | Content text, not long reading |
| Black text on #6699CD | 7.00:1 | AAA | Lc 47.5 | Large or bold text, headings |
| #6699CD text on white | 2.99:1 | Fails | Lc 56.5 | Large or bold text, headings |
| #6699CD text on black | 7.00:1 | AAA | Lc -45.2 | 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 500.
-
Step 50
50
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EBF3
oklch(93.6% 0.014 248)
-
Step 200
200
#CDDBEA
oklch(88.5% 0.026 250)
-
Step 300
300
#ABC4DE
oklch(81% 0.046 249.4)
-
Step 400
400
#7DA5CE
oklch(70.8% 0.074 249.5)
-
Step 500
500 (this color)
#6699CD
oklch(66.8% 0.095 249.9)
-
Step 600
600
#4077AD
oklch(55.6% 0.103 249.8)
-
Step 700
700
#316495
oklch(49.1% 0.096 249.6)
-
Step 800
800
#2A5279
oklch(42.8% 0.079 249.6)
-
Step 900
900
#264461
oklch(37.7% 0.062 249)
-
Step 950
950
#172839
oklch(27.1% 0.039 249.5)
#6699CD 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) | #849BCF | 0.037 |
| Deuteranopia (no green cones) | #7790CC | 0.029 |
| Tritanopia (no blue cones) | #33A5AB | 0.082 |
| Achromatopsia (no color) | #959595 | 0.095 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6699CD
#6699CD
oklch(66.8% 0.095 249.9)
- #BA8A50
#BA8A50
oklch(66.8% 0.095 70.2)
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 #6699CD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.040
- Greyblue #77A1B5 ΔE 0.052
- Cornflower Blue #6495ED ΔE 0.052
- Silver Lake Blue #778DA9 ΔE 0.056
- Chefchaouen Blue #4895EF ΔE 0.060
- Dark Sky Blue #448EE4 ΔE 0.061
- Blue Grey #758DA3 ΔE 0.063
- Cool Gray #8D99AE ΔE 0.063
Use #6699CD 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.