#669597
Closest named color: Cadet Blue (#5F9EA0). oklch(63.7% 0.051 199.3), rgb(102, 149, 151).
Aa
Black text reads best on this color (6.31:1).
About this color
#669597 is a medium-light, muted teal or cyan. In OKLCH its lightness is 64%, its chroma 0.051 and its hue 199°. 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 6.31:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (64%) |
| Chroma | muted (0.051) |
| Temperature | cool |
| Nearest name | Cadet Blue (#5F9EA0) |
| Black text | 6.31:1 |
| White text | 3.32:1 |
Values
| HEX | #669597 |
| RGB | rgb(102, 149, 151) |
| HSL | hsl(182, 19%, 50%) |
| OKLCH | oklch(63.7% 0.051 199.3) |
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 #669597 | 3.32:1 | AA large text | Lc -66.1 | Content text, not long reading |
| Black text on #669597 | 6.31:1 | AA | Lc 43.4 | Non-text elements, placeholder text |
| #669597 text on white | 3.32:1 | AA large text | Lc 60.6 | Content text, not long reading |
| #669597 text on black | 6.31:1 | AA | Lc -41.1 | 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
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E5EBEC
oklch(93.6% 0.007 208.8)
-
Step 200
200
#CFDCDC
oklch(88.5% 0.014 196.9)
-
Step 300
300
#AFC6C7
oklch(81% 0.025 199.9)
-
Step 400
400
#84A9AA
oklch(70.8% 0.04 198.3)
-
Step 500
500 (this color)
#669597
oklch(63.7% 0.051 199.3)
-
Step 600
600
#4A7D80
oklch(55.5% 0.055 200.5)
-
Step 700
700
#3B6A6C
oklch(49.2% 0.052 199.2)
-
Step 800
800
#315658
oklch(42.6% 0.043 200.1)
-
Step 900
900
#2C4748
oklch(37.7% 0.033 198.8)
-
Step 950
950
#1A2A2A
oklch(27.1% 0.021 196)
#669597 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) | #8F9197 | 0.053 |
| Deuteranopia (no green cones) | #868A97 | 0.049 |
| Tritanopia (no blue cones) | #549895 | 0.020 |
| Achromatopsia (no color) | #8D8D8D | 0.051 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #669597
#669597
oklch(63.7% 0.051 199.3)
- #A87F7F
#A87F7F
oklch(63.6% 0.051 18.6)
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 #669597, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cadet Blue #5F9EA0 ΔE 0.025
- Grey Teal #5E9B8A ΔE 0.032
- Dull Teal #5F9E8F ΔE 0.033
- Blue Grey #758DA3 ΔE 0.038
- Sea #3C9992 ΔE 0.041
- Dusty Teal #4C9085 ΔE 0.042
- Light Slate Gray #778899 ΔE 0.042
- Silver Lake Blue #778DA9 ΔE 0.046
Use #669597 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.