#648B8D
Closest named color: Steel Grey (#6F828A). oklch(60.9% 0.043 200.1), rgb(100, 139, 141).
Aa
Black text reads best on this color (5.61:1).
About this color
#648B8D is a medium-dark, muted teal or cyan. In OKLCH its lightness is 61%, its chroma 0.043 and its hue 200°. Its hue sits on the cool side of the wheel. The nearest named color is Steel Grey (#6F828A), ΔE 0.027 away. Black text reads best on it, at 5.61:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (61%) |
| Chroma | muted (0.043) |
| Temperature | cool |
| Nearest name | Steel Grey (#6F828A) |
| Black text | 5.61:1 |
| White text | 3.73:1 |
Values
| HEX | #648B8D |
| RGB | rgb(100, 139, 141) |
| HSL | hsl(183, 17%, 47%) |
| OKLCH | oklch(60.9% 0.043 200.1) |
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 #648B8D | 3.73:1 | AA large text | Lc -70.4 | Content text, not long reading |
| Black text on #648B8D | 5.61:1 | AA | Lc 39.2 | Non-text elements, placeholder text |
| #648B8D text on white | 3.73:1 | AA large text | Lc 64.9 | Content text, not long reading |
| #648B8D text on black | 5.61:1 | AA | Lc -36.8 | 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
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E5EBEB
oklch(93.6% 0.006 197)
-
Step 200
200
#D1DCDC
oklch(88.6% 0.012 196.9)
-
Step 300
300
#B2C5C6
oklch(80.9% 0.021 200.6)
-
Step 400
400
#89A7A9
oklch(70.6% 0.033 201.4)
-
Step 500
500 (this color)
#648B8D
oklch(60.9% 0.043 200.1)
-
Step 600
600
#527C7E
oklch(55.6% 0.047 199.7)
-
Step 700
700
#42686A
oklch(49% 0.043 200.1)
-
Step 800
800
#375557
oklch(42.7% 0.036 201.2)
-
Step 900
900
#304647
oklch(37.6% 0.027 199.6)
-
Step 950
950
#1C292A
oklch(26.9% 0.018 202.1)
#648B8D 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) | #86878D | 0.045 |
| Deuteranopia (no green cones) | #7E828D | 0.041 |
| Tritanopia (no blue cones) | #568E8B | 0.018 |
| Achromatopsia (no color) | #848484 | 0.044 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #648B8D
#648B8D
oklch(60.9% 0.043 200.1)
- #9B7978
#9B7978
oklch(60.9% 0.043 20.4)
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 #648B8D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Steel Grey #6F828A ΔE 0.027
- Steel #738595 ΔE 0.031
- Dusty Teal #4C9085 ΔE 0.033
- Light Slate Gray #778899 ΔE 0.034
- Slate Gray #708090 ΔE 0.036
- Blue Grey #758DA3 ΔE 0.041
- Battleship Grey #6B7C85 ΔE 0.042
- Grey Blue #647D8E ΔE 0.042
Use #648B8D 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.