#66919E
Closest named color: Blue Grey (#758DA3). oklch(63% 0.051 218.6), rgb(102, 145, 158).
Aa
Black text reads best on this color (6.10:1).
About this color
#66919E is a medium-light, muted teal or cyan. In OKLCH its lightness is 63%, its chroma 0.051 and its hue 219°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Grey (#758DA3), ΔE 0.024 away. Black text reads best on it, at 6.10:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (63%) |
| Chroma | muted (0.051) |
| Temperature | cool |
| Nearest name | Blue Grey (#758DA3) |
| Black text | 6.10:1 |
| White text | 3.43:1 |
Values
| HEX | #66919E |
| RGB | rgb(102, 145, 158) |
| HSL | hsl(194, 22%, 51%) |
| OKLCH | oklch(63% 0.051 218.6) |
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 #66919E | 3.43:1 | AA large text | Lc -67.3 | Content text, not long reading |
| Black text on #66919E | 6.10:1 | AA | Lc 42.2 | Non-text elements, placeholder text |
| #66919E text on white | 3.43:1 | AA large text | Lc 61.9 | Content text, not long reading |
| #66919E text on black | 6.10:1 | AA | Lc -39.8 | 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
#E5EBED
oklch(93.6% 0.007 219.6)
-
Step 200
200
#D0DBDF
oklch(88.4% 0.013 221.4)
-
Step 300
300
#B0C5CB
oklch(80.9% 0.024 216.8)
-
Step 400
400
#86A7B1
oklch(70.7% 0.039 218.2)
-
Step 500
500 (this color)
#66919E
oklch(63% 0.051 218.6)
-
Step 600
600
#4D7B89
oklch(55.5% 0.055 219.2)
-
Step 700
700
#3D6874
oklch(49.1% 0.051 217.6)
-
Step 800
800
#33555F
oklch(42.8% 0.043 218.5)
-
Step 900
900
#2D464D
oklch(37.7% 0.033 217.2)
-
Step 950
950
#1B292D
oklch(27% 0.02 217.4)
#66919E 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) | #898E9F | 0.045 |
| Deuteranopia (no green cones) | #80879E | 0.041 |
| Tritanopia (no blue cones) | #529695 | 0.031 |
| Achromatopsia (no color) | #8A8A8A | 0.051 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66919E
#66919E
oklch(63% 0.051 218.6)
- #A57F73
#A57F73
oklch(63% 0.051 38.2)
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 #66919E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Grey #758DA3 ΔE 0.024
- Light Slate Gray #778899 ΔE 0.030
- Silver Lake Blue #778DA9 ΔE 0.032
- Steel #738595 ΔE 0.034
- Cadet Blue #5F9EA0 ΔE 0.037
- Steel Grey #6F828A ΔE 0.044
- Slate Gray #708090 ΔE 0.047
- Dusty Blue #5A86AD ΔE 0.048
Use #66919E 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.