#6699AA
Closest named color: Cadet Blue (#5F9EA0). oklch(65.3% 0.06 220.9), rgb(102, 153, 170).
Aa
Black text reads best on this color (6.70:1).
About this color
#6699AA is a medium-light, muted teal or cyan. In OKLCH its lightness is 65%, its chroma 0.060 and its hue 221°. Its hue sits on the cool side of the wheel. The nearest named color is Cadet Blue (#5F9EA0), ΔE 0.025 away. Black text reads best on it, at 6.70:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (65%) |
| Chroma | muted (0.060) |
| Temperature | cool |
| Nearest name | Cadet Blue (#5F9EA0) |
| Black text | 6.70:1 |
| White text | 3.13:1 |
Values
| HEX | #6699AA |
| RGB | rgb(102, 153, 170) |
| HSL | hsl(195, 29%, 53%) |
| OKLCH | oklch(65.3% 0.06 220.9) |
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 #6699AA | 3.13:1 | AA large text | Lc -63.7 | Content text, not long reading |
| Black text on #6699AA | 6.70:1 | AA | Lc 45.7 | Large or bold text, headings |
| #6699AA text on white | 3.13:1 | AA large text | Lc 58.3 | Large or bold text, headings |
| #6699AA text on black | 6.70:1 | AA | Lc -43.4 | 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
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E4EBEE
oklch(93.6% 0.009 225.1)
-
Step 200
200
#CEDCE1
oklch(88.5% 0.017 221.1)
-
Step 300
300
#ADC5CE
oklch(80.8% 0.029 222.4)
-
Step 400
400
#81A8B5
oklch(70.7% 0.046 220.3)
-
Step 500
500 (this color)
#6699AA
oklch(65.3% 0.06 220.9)
-
Step 600
600
#447C8E
oklch(55.5% 0.065 221)
-
Step 700
700
#366979
oklch(49.2% 0.06 220.6)
-
Step 800
800
#2D5562
oklch(42.6% 0.05 221.2)
-
Step 900
900
#294750
oklch(37.8% 0.039 219)
-
Step 950
950
#18292F
oklch(26.9% 0.025 222.2)
#6699AA 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) | #8F96AB | 0.051 |
| Deuteranopia (no green cones) | #848EAA | 0.045 |
| Tritanopia (no blue cones) | #4B9F9E | 0.039 |
| Achromatopsia (no color) | #919191 | 0.060 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6699AA
#6699AA
oklch(65.3% 0.06 220.9)
- #B18474
#B18474
oklch(65.3% 0.061 40.4)
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 #6699AA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cadet Blue #5F9EA0 ΔE 0.025
- Greyblue #77A1B5 ΔE 0.034
- Blue Grey #758DA3 ΔE 0.035
- Silver Lake Blue #778DA9 ΔE 0.037
- Light Slate Gray #778899 ΔE 0.049
- Dull Teal #5F9E8F ΔE 0.049
- Cool Gray #8D99AE ΔE 0.049
- Bluey Grey #89A0B0 ΔE 0.049
Use #6699AA 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.