#636889
Closest named color: Metallic Blue (#4F738E). oklch(52.6% 0.052 277.7), rgb(99, 104, 137).
Aa
White text reads best on this color (5.42:1).
About this color
#636889 is a medium-dark, muted blue. In OKLCH its lightness is 53%, its chroma 0.052 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Metallic Blue (#4F738E), ΔE 0.038 away. White text reads best on it, at 5.42:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | muted (0.052) |
| Temperature | cool |
| Nearest name | Metallic Blue (#4F738E) |
| Black text | 3.87:1 |
| White text | 5.42:1 |
Values
| HEX | #636889 |
| RGB | rgb(99, 104, 137) |
| HSL | hsl(232, 16%, 46%) |
| OKLCH | oklch(52.6% 0.052 277.7) |
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 #636889 | 5.42:1 | AA | Lc -82.4 | Fine for body text |
| Black text on #636889 | 3.87:1 | AA large text | Lc 27.0 | Dividers and decoration only |
| #636889 text on white | 5.42:1 | AA | Lc 77.0 | Fine for body text |
| #636889 text on black | 3.87:1 | AA large text | Lc -24.7 | 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
#F5F5F8
oklch(97.1% 0.004 286.3)
-
Step 100
100
#E8E9EE
oklch(93.5% 0.007 277.2)
-
Step 200
200
#D7D8E2
oklch(88.4% 0.014 281.5)
-
Step 300
300
#BDBFD0
oklch(80.8% 0.024 280.5)
-
Step 400
400
#9A9FB8
oklch(70.7% 0.037 276.5)
-
Step 500
500
#8287A7
oklch(63.1% 0.048 278)
-
Step 600
600 (this color)
#636889
oklch(52.6% 0.052 277.7)
-
Step 700
700
#5A5E7C
oklch(49% 0.048 278.5)
-
Step 800
800
#494D65
oklch(42.6% 0.04 277.2)
-
Step 900
900
#3D4052
oklch(37.6% 0.031 277.4)
-
Step 950
950
#242630
oklch(27.1% 0.019 276.2)
#636889 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) | #5F6B8A | 0.010 |
| Deuteranopia (no green cones) | #5C6988 | 0.011 |
| Tritanopia (no blue cones) | #5A6E73 | 0.047 |
| Achromatopsia (no color) | #6A6A6A | 0.052 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #636889
#636889
oklch(52.6% 0.052 277.7)
- #736B48
#736B48
oklch(52.6% 0.052 96.8)
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 #636889, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Metallic Blue #4F738E ΔE 0.038
- Slate #516572 ΔE 0.047
- Dull Blue #49759C ΔE 0.048
- Battleship Gray #6C757D ΔE 0.051
- Grey Purple #826D8C ΔE 0.052
- Dim Gray #696969 ΔE 0.053
- Dusty Purple #825F87 ΔE 0.053
- Dusky Blue #475F94 ΔE 0.054
Use #636889 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.