#6699BE
Closest named color: Faded Blue (#658CBB). oklch(66.1% 0.078 240.9), rgb(102, 153, 190).
Aa
Black text reads best on this color (6.86:1).
About this color
#6699BE is a medium-light, moderately saturated blue. In OKLCH its lightness is 66%, its chroma 0.078 and its hue 241°. 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 6.86:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.078) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.86:1 |
| White text | 3.05:1 |
Values
| HEX | #6699BE |
| RGB | rgb(102, 153, 190) |
| HSL | hsl(205, 40%, 57%) |
| OKLCH | oklch(66.1% 0.078 240.9) |
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 #6699BE | 3.05:1 | AA large text | Lc -62.7 | Content text, not long reading |
| Black text on #6699BE | 6.86:1 | AA | Lc 46.7 | Large or bold text, headings |
| #6699BE text on white | 3.05:1 | AA large text | Lc 57.4 | Large or bold text, headings |
| #6699BE text on black | 6.86:1 | AA | Lc -44.4 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
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
#ACC4D7
oklch(80.8% 0.038 241.9)
-
Step 400
400
#7FA6C3
oklch(70.7% 0.06 240.9)
-
Step 500
500 (this color)
#6699BE
oklch(66.1% 0.078 240.9)
-
Step 600
600
#4279A0
oklch(55.5% 0.084 241.4)
-
Step 700
700
#336689
oklch(49.1% 0.079 240.9)
-
Step 800
800
#2B536F
oklch(42.6% 0.065 241.1)
-
Step 900
900
#28455A
oklch(37.7% 0.05 241.3)
-
Step 950
950
#182935
oklch(27.2% 0.032 240.2)
#6699BE 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) | #8999C0 | 0.043 |
| Deuteranopia (no green cones) | #7D8FBD | 0.036 |
| Tritanopia (no blue cones) | #3FA2A5 | 0.063 |
| Achromatopsia (no color) | #939393 | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6699BE
#6699BE
oklch(66.1% 0.078 240.9)
- #B68861
#B68861
oklch(66.2% 0.078 61.2)
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 #6699BE, 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 0.036
- Silver Lake Blue #778DA9 ΔE 0.041
- Blue Grey #758DA3 ΔE 0.045
- Cool Gray #8D99AE ΔE 0.051
- Cadet Blue #5F9EA0 ΔE 0.053
- Bluey Grey #89A0B0 ΔE 0.053
- Bluegrey #85A3B2 ΔE 0.054
Use #6699BE 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.