#668A9D
Closest named color: Steel (#738595). oklch(61.3% 0.049 231.6), rgb(102, 138, 157).
Aa
Black text reads best on this color (5.68:1).
About this color
#668A9D is a medium-dark, muted blue. In OKLCH its lightness is 61%, its chroma 0.049 and its hue 232°. 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 5.68:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | muted (0.049) |
| Temperature | cool |
| Nearest name | Steel (#738595) |
| Black text | 5.68:1 |
| White text | 3.69:1 |
Values
| HEX | #668A9D |
| RGB | rgb(102, 138, 157) |
| HSL | hsl(201, 22%, 51%) |
| OKLCH | oklch(61.3% 0.049 231.6) |
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 #668A9D | 3.69:1 | AA large text | Lc -70.0 | Content text, not long reading |
| Black text on #668A9D | 5.68:1 | AA | Lc 39.6 | Non-text elements, placeholder text |
| #668A9D text on white | 3.69:1 | AA large text | Lc 64.5 | Content text, not long reading |
| #668A9D text on black | 5.68:1 | AA | Lc -37.2 | 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
#E5EBEE
oklch(93.6% 0.008 228.9)
-
Step 200
200
#D1DBE0
oklch(88.5% 0.013 228.9)
-
Step 300
300
#B2C4CE
oklch(81% 0.024 231.9)
-
Step 400
400
#89A5B5
oklch(70.6% 0.039 233.1)
-
Step 500
500 (this color)
#668A9D
oklch(61.3% 0.049 231.6)
-
Step 600
600
#52798E
oklch(55.5% 0.055 232.6)
-
Step 700
700
#436678
oklch(49.1% 0.049 231.5)
-
Step 800
800
#375362
oklch(42.6% 0.042 232.4)
-
Step 900
900
#304550
oklch(37.7% 0.032 231.5)
-
Step 950
950
#1C282F
oklch(26.9% 0.021 234.2)
#668A9D 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) | #81899E | 0.035 |
| Deuteranopia (no green cones) | #79829D | 0.032 |
| Tritanopia (no blue cones) | #538F90 | 0.036 |
| Achromatopsia (no color) | #858585 | 0.050 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #668A9D
#668A9D
oklch(61.3% 0.049 231.6)
- #9D7C69
#9D7C69
oklch(61.3% 0.05 51.4)
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 #668A9D, 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 0.021
- Blue Grey #758DA3 ΔE 0.023
- Silver Lake Blue #778DA9 ΔE 0.030
- Slate Gray #708090 ΔE 0.030
- Steel Grey #6F828A ΔE 0.031
- Dusty Blue #5A86AD ΔE 0.033
- Grey Blue #647D8E ΔE 0.039
Use #668A9D 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.