#66879F
Closest named color: Steel (#738595). oklch(60.7% 0.052 240.3), rgb(102, 135, 159).
Aa
Black text reads best on this color (5.53:1).
About this color
#66879F is a medium-dark, muted blue. In OKLCH its lightness is 61%, its chroma 0.052 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is Steel (#738595), ΔE 0.020 away. Black text reads best on it, at 5.53:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | muted (0.052) |
| Temperature | cool |
| Nearest name | Steel (#738595) |
| Black text | 5.53:1 |
| White text | 3.79:1 |
Values
| HEX | #66879F |
| RGB | rgb(102, 135, 159) |
| HSL | hsl(205, 23%, 51%) |
| OKLCH | oklch(60.7% 0.052 240.3) |
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 #66879F | 3.79:1 | AA large text | Lc -71.0 | Content text, not long reading |
| Black text on #66879F | 5.53:1 | AA | Lc 38.6 | Non-text elements, placeholder text |
| #66879F text on white | 3.79:1 | AA large text | Lc 65.5 | Content text, not long reading |
| #66879F text on black | 5.53:1 | AA | Lc -36.2 | 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
#E6EBEE
oklch(93.7% 0.007 233.6)
-
Step 200
200
#D1DBE2
oklch(88.6% 0.015 238)
-
Step 300
300
#B2C3D0
oklch(80.8% 0.026 240.7)
-
Step 400
400
#8AA5B8
oklch(70.8% 0.041 238.8)
-
Step 500
500 (this color)
#66879F
oklch(60.7% 0.052 240.3)
-
Step 600
600
#547892
oklch(55.6% 0.058 240.5)
-
Step 700
700
#45657C
oklch(49.1% 0.053 240.4)
-
Step 800
800
#395265
oklch(42.6% 0.044 241.8)
-
Step 900
900
#314452
oklch(37.6% 0.034 240.7)
-
Step 950
950
#1D2830
oklch(27% 0.021 240.1)
#66879F 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) | #7D86A0 | 0.030 |
| Deuteranopia (no green cones) | #75809F | 0.026 |
| Tritanopia (no blue cones) | #538D8F | 0.041 |
| Achromatopsia (no color) | #838383 | 0.052 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66879F
#66879F
oklch(60.7% 0.052 240.3)
- #9A7B63
#9A7B63
oklch(60.6% 0.052 59.3)
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 #66879F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Steel #738595 ΔE 0.020
- Light Slate Gray #778899 ΔE 0.024
- Dusty Blue #5A86AD ΔE 0.026
- Slate Gray #708090 ΔE 0.027
- Blue Grey #758DA3 ΔE 0.027
- Steel Grey #6F828A ΔE 0.031
- Silver Lake Blue #778DA9 ΔE 0.032
- Off Blue #5684AE ΔE 0.032
Use #66879F 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.