#646883
Closest named color: Metallic Blue (#4F738E). oklch(52.4% 0.043 278.2), rgb(100, 104, 131).
Aa
White text reads best on this color (5.45:1).
About this color
#646883 is a medium-dark, muted blue. In OKLCH its lightness is 52%, its chroma 0.043 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Metallic Blue (#4F738E), ΔE 0.039 away. White text reads best on it, at 5.45:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | muted (0.043) |
| Temperature | cool |
| Nearest name | Metallic Blue (#4F738E) |
| Black text | 3.84:1 |
| White text | 5.45:1 |
Values
| HEX | #646883 |
| RGB | rgb(100, 104, 131) |
| HSL | hsl(232, 13%, 45%) |
| OKLCH | oklch(52.4% 0.043 278.2) |
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 #646883 | 5.45:1 | AA | Lc -82.5 | Fine for body text |
| Black text on #646883 | 3.84:1 | AA large text | Lc 26.8 | Dividers and decoration only |
| #646883 text on white | 5.45:1 | AA | Lc 77.2 | Fine for body text |
| #646883 text on black | 3.84:1 | AA large text | Lc -24.5 | Dividers and decoration only |
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
#F5F5F7
oklch(97.1% 0.003 286.4)
-
Step 100
100
#E9E9EE
oklch(93.5% 0.007 286.3)
-
Step 200
200
#D7D9E0
oklch(88.6% 0.01 273.3)
-
Step 300
300
#BDC0CD
oklch(80.9% 0.018 275.6)
-
Step 400
400
#9C9FB4
oklch(70.7% 0.031 279.1)
-
Step 500
500
#8388A2
oklch(63.2% 0.039 276.6)
-
Step 600
600 (this color)
#646883
oklch(52.4% 0.043 278.2)
-
Step 700
700
#5B5F77
oklch(49.1% 0.039 277.5)
-
Step 800
800
#4A4D61
oklch(42.5% 0.033 278.2)
-
Step 900
900
#3E404F
oklch(37.6% 0.026 279.1)
-
Step 950
950
#24262E
oklch(27% 0.015 274.3)
#646883 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) | #616B84 | 0.009 |
| Deuteranopia (no green cones) | #5F6882 | 0.008 |
| Tritanopia (no blue cones) | #5D6D71 | 0.038 |
| Achromatopsia (no color) | #696969 | 0.043 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #646883
#646883
oklch(52.4% 0.043 278.2)
- #706B4E
#706B4E
oklch(52.4% 0.043 99.5)
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 #646883, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Metallic Blue #4F738E ΔE 0.039
- Slate #516572 ΔE 0.040
- Dim Gray #696969 ΔE 0.043
- Battleship Gray #6C757D ΔE 0.045
- Grey Purple #826D8C ΔE 0.052
- Dull Blue #49759C ΔE 0.053
- Dusty Purple #825F87 ΔE 0.054
- Muted Purple #805B87 ΔE 0.057
Use #646883 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.