#637582
Closest named color: Battleship Gray (#6C757D). oklch(55.2% 0.029 239.5), rgb(99, 117, 130).
Aa
White text reads best on this color (4.77:1).
About this color
#637582 is a medium-dark close to neutral grey. In OKLCH its lightness is 55%, its chroma 0.029. It has too little chroma to lean warm or cool. The nearest named color is Battleship Gray (#6C757D), ΔE 0.014 away. White text reads best on it, at 4.77:1.
| Hue family | Neutrals |
| Lightness | medium-dark (55%) |
| Chroma | close to neutral grey (0.029) |
| Temperature | neutral |
| Nearest name | Battleship Gray (#6C757D) |
| Black text | 4.39:1 |
| White text | 4.77:1 |
Values
| HEX | #637582 |
| RGB | rgb(99, 117, 130) |
| HSL | hsl(205, 14%, 45%) |
| OKLCH | oklch(55.2% 0.029 239.5) |
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 #637582 | 4.77:1 | AA | Lc -78.6 | Fine for body text |
| Black text on #637582 | 4.39:1 | AA large text | Lc 30.9 | Non-text elements, placeholder text |
| #637582 text on white | 4.77:1 | AA | Lc 73.2 | Content text, not long reading |
| #637582 text on black | 4.39:1 | AA large text | Lc -28.5 | 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
#F4F6F6
oklch(97.2% 0.002 197.1)
-
Step 100
100
#E8EAEC
oklch(93.6% 0.003 247.9)
-
Step 200
200
#D5DADD
oklch(88.5% 0.007 233.7)
-
Step 300
300
#B9C2C8
oklch(80.9% 0.013 236.7)
-
Step 400
400
#95A3AD
oklch(70.8% 0.022 238.8)
-
Step 500
500
#7B8C98
oklch(63.1% 0.027 238.7)
-
Step 600
600 (this color)
#637582
oklch(55.2% 0.029 239.5)
-
Step 700
700
#53636F
oklch(49.1% 0.027 240.6)
-
Step 800
800
#44515A
oklch(42.7% 0.022 238.3)
-
Step 900
900
#39434A
oklch(37.7% 0.018 238.5)
-
Step 950
950
#22272B
oklch(26.9% 0.01 242.1)
#637582 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) | #707583 | 0.019 |
| Deuteranopia (no green cones) | #6B7182 | 0.015 |
| Tritanopia (no blue cones) | #5A7879 | 0.023 |
| Achromatopsia (no color) | #737373 | 0.030 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #637582
#637582
oklch(55.2% 0.029 239.5)
- #806F61
#806F61
oklch(55.4% 0.03 61.6)
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 #637582, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Battleship Gray #6C757D ΔE 0.014
- Battleship Grey #6B7C85 ΔE 0.024
- Grey Blue #647D8E ΔE 0.026
- Metallic Blue #4F738E ΔE 0.032
- Slate Gray #708090 ΔE 0.040
- Steel Grey #6F828A ΔE 0.042
- Stormy Blue #507B9C ΔE 0.043
- Dim Gray #696969 ΔE 0.043
Use #637582 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.