#648191
Closest named color: Grey Blue (#647D8E). oklch(58.7% 0.041 232.5), rgb(100, 129, 145).
Aa
Black text reads best on this color (5.09:1).
About this color
#648191 is a medium-dark, muted blue. In OKLCH its lightness is 59%, its chroma 0.041 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is Grey Blue (#647D8E), ΔE 0.011 away. Black text reads best on it, at 5.09:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | muted (0.041) |
| Temperature | cool |
| Nearest name | Grey Blue (#647D8E) |
| Black text | 5.09:1 |
| White text | 4.12:1 |
Values
| HEX | #648191 |
| RGB | rgb(100, 129, 145) |
| HSL | hsl(201, 18%, 48%) |
| OKLCH | oklch(58.7% 0.041 232.5) |
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 #648191 | 4.12:1 | AA large text | Lc -73.8 | Content text, not long reading |
| Black text on #648191 | 5.09:1 | AA | Lc 35.7 | Non-text elements, placeholder text |
| #648191 text on white | 4.12:1 | AA large text | Lc 68.3 | Content text, not long reading |
| #648191 text on black | 5.09:1 | AA | Lc -33.3 | 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 600.
-
Step 50
50
#F4F6F7
oklch(97.2% 0.003 228.8)
-
Step 100
100
#E6EAED
oklch(93.5% 0.006 239.8)
-
Step 200
200
#D3DADF
oklch(88.4% 0.01 238.5)
-
Step 300
300
#B5C3CB
oklch(80.9% 0.019 232.6)
-
Step 400
400
#8FA4B0
oklch(70.6% 0.029 232.9)
-
Step 500
500
#738E9D
oklch(63.1% 0.038 232.5)
-
Step 600
600 (this color)
#648191
oklch(58.7% 0.041 232.5)
-
Step 700
700
#4B6573
oklch(49.1% 0.038 232)
-
Step 800
800
#3E525E
oklch(42.7% 0.032 234.8)
-
Step 900
900
#35444D
oklch(37.7% 0.025 234.6)
-
Step 950
950
#1F282D
oklch(27% 0.016 232.4)
#648191 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) | #798092 | 0.028 |
| Deuteranopia (no green cones) | #737B91 | 0.025 |
| Tritanopia (no blue cones) | #568586 | 0.029 |
| Achromatopsia (no color) | #7D7D7D | 0.041 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #648191
#648191
oklch(58.7% 0.041 232.5)
- #917666
#917666
oklch(58.7% 0.041 52.3)
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 #648191, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grey Blue #647D8E ΔE 0.011
- Slate Gray #708090 ΔE 0.015
- Steel Grey #6F828A ΔE 0.018
- Battleship Grey #6B7C85 ΔE 0.020
- Steel #738595 ΔE 0.024
- Light Slate Gray #778899 ΔE 0.035
- Stormy Blue #507B9C ΔE 0.037
- Battleship Gray #6C757D ΔE 0.039
Use #648191 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.