#6699BF
Closest named color: Faded Blue (#658CBB). oklch(66.2% 0.079 241.6), rgb(102, 153, 191).
Aa
Black text reads best on this color (6.87:1).
About this color
#6699BF is a medium-light, moderately saturated blue. In OKLCH its lightness is 66%, its chroma 0.079 and its hue 242°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.036 away. Black text reads best on it, at 6.87:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.079) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.87:1 |
| White text | 3.05:1 |
Values
| HEX | #6699BF |
| RGB | rgb(102, 153, 191) |
| HSL | hsl(206, 41%, 57%) |
| OKLCH | oklch(66.2% 0.079 241.6) |
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 #6699BF | 3.05:1 | AA large text | Lc -62.7 | Content text, not long reading |
| Black text on #6699BF | 6.87:1 | AA | Lc 46.7 | Large or bold text, headings |
| #6699BF text on white | 3.05:1 | AA large text | Lc 57.3 | Large or bold text, headings |
| #6699BF text on black | 6.87:1 | AA | Lc -44.5 | Non-text elements, placeholder text |
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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E4EBF1
oklch(93.6% 0.011 243.7)
-
Step 200
200
#CDDBE6
oklch(88.4% 0.021 241.4)
-
Step 300
300
#ACC4D8
oklch(80.9% 0.039 243.3)
-
Step 400
400
#7FA6C4
oklch(70.7% 0.061 241.8)
-
Step 500
500 (this color)
#6699BF
oklch(66.2% 0.079 241.6)
-
Step 600
600
#4279A1
oklch(55.6% 0.086 242.1)
-
Step 700
700
#33668A
oklch(49.1% 0.08 241.6)
-
Step 800
800
#2B5370
oklch(42.6% 0.066 242)
-
Step 900
900
#27455B
oklch(37.7% 0.052 241.8)
-
Step 950
950
#182835
oklch(26.9% 0.033 243.9)
#6699BF 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) | #8999C1 | 0.043 |
| Deuteranopia (no green cones) | #7D8FBE | 0.036 |
| Tritanopia (no blue cones) | #3FA2A6 | 0.063 |
| Achromatopsia (no color) | #939393 | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6699BF
#6699BF
oklch(66.2% 0.079 241.6)
- #B68860
#B68860
oklch(66.2% 0.079 61.8)
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 #6699BF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.036
- Greyblue #77A1B5 ΔE 0.037
- Silver Lake Blue #778DA9 ΔE 0.041
- Blue Grey #758DA3 ΔE 0.046
- Cool Gray #8D99AE ΔE 0.052
- Bluey Grey #89A0B0 ΔE 0.054
- Bluegrey #85A3B2 ΔE 0.054
- Cadet Blue #5F9EA0 ΔE 0.055
Use #6699BF 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.