#669CAB
Closest named color: Cadet Blue (#5F9EA0). oklch(66.1% 0.061 217.2), rgb(102, 156, 171).
Aa
Black text reads best on this color (6.90:1).
About this color
#669CAB is a medium-light, muted teal or cyan. In OKLCH its lightness is 66%, its chroma 0.061 and its hue 217°. Its hue sits on the cool side of the wheel. The nearest named color is Cadet Blue (#5F9EA0), ΔE 0.021 away. Black text reads best on it, at 6.90:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (66%) |
| Chroma | muted (0.061) |
| Temperature | cool |
| Nearest name | Cadet Blue (#5F9EA0) |
| Black text | 6.90:1 |
| White text | 3.03:1 |
Values
| HEX | #669CAB |
| RGB | rgb(102, 156, 171) |
| HSL | hsl(193, 29%, 54%) |
| OKLCH | oklch(66.1% 0.061 217.2) |
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 #669CAB | 3.03:1 | AA large text | Lc -62.5 | Content text, not long reading |
| Black text on #669CAB | 6.90:1 | AA | Lc 46.9 | Large or bold text, headings |
| #669CAB text on white | 3.03:1 | AA large text | Lc 57.1 | Large or bold text, headings |
| #669CAB text on black | 6.90:1 | AA | Lc -44.6 | 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
#CEDCE0
oklch(88.5% 0.016 216.7)
-
Step 300
300
#ACC6CD
oklch(80.9% 0.03 215.8)
-
Step 400
400
#7FA8B4
oklch(70.6% 0.048 217.7)
-
Step 500
500 (this color)
#669CAB
oklch(66.1% 0.061 217.2)
-
Step 600
600
#427D8D
oklch(55.6% 0.066 217.6)
-
Step 700
700
#336978
oklch(49% 0.062 218.3)
-
Step 800
800
#2B5661
oklch(42.7% 0.051 216.5)
-
Step 900
900
#28474F
oklch(37.7% 0.039 216.1)
-
Step 950
950
#182A2F
oklch(27.2% 0.025 217.2)
#669CAB 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) | #9299AC | 0.054 |
| Deuteranopia (no green cones) | #8790AB | 0.050 |
| Tritanopia (no blue cones) | #4AA2A1 | 0.037 |
| Achromatopsia (no color) | #949494 | 0.061 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #669CAB
#669CAB
oklch(66.1% 0.061 217.2)
- #B48678
#B48678
oklch(66.1% 0.061 37.6)
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 #669CAB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cadet Blue #5F9EA0 ΔE 0.021
- Greyblue #77A1B5 ΔE 0.028
- Blue Grey #758DA3 ΔE 0.042
- Bluegrey #85A3B2 ΔE 0.044
- Silver Lake Blue #778DA9 ΔE 0.044
- Bluey Grey #89A0B0 ΔE 0.045
- Dull Teal #5F9E8F ΔE 0.046
- Cool Gray #8D99AE ΔE 0.048
Use #669CAB 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.