#648D99
Closest named color: Light Slate Gray (#778899). oklch(61.8% 0.049 217.9), rgb(100, 141, 153).
Aa
Black text reads best on this color (5.81:1).
About this color
#648D99 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 62%, its chroma 0.049 and its hue 218°. Its hue sits on the cool side of the wheel. The nearest named color is Light Slate Gray (#778899), ΔE 0.026 away. Black text reads best on it, at 5.81:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (62%) |
| Chroma | muted (0.049) |
| Temperature | cool |
| Nearest name | Light Slate Gray (#778899) |
| Black text | 5.81:1 |
| White text | 3.61:1 |
Values
| HEX | #648D99 |
| RGB | rgb(100, 141, 153) |
| HSL | hsl(194, 21%, 50%) |
| OKLCH | oklch(61.8% 0.049 217.9) |
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 #648D99 | 3.61:1 | AA large text | Lc -69.2 | Content text, not long reading |
| Black text on #648D99 | 5.81:1 | AA | Lc 40.4 | Non-text elements, placeholder text |
| #648D99 text on white | 3.61:1 | AA large text | Lc 63.7 | Content text, not long reading |
| #648D99 text on black | 5.81:1 | AA | Lc -38.0 | 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
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E5EBED
oklch(93.6% 0.007 219.6)
-
Step 200
200
#D0DBDF
oklch(88.4% 0.013 221.4)
-
Step 300
300
#B0C5CB
oklch(80.9% 0.024 216.8)
-
Step 400
400
#87A7B0
oklch(70.7% 0.038 216.7)
-
Step 500
500 (this color)
#648D99
oklch(61.8% 0.049 217.9)
-
Step 600
600
#4F7B88
oklch(55.6% 0.052 218.4)
-
Step 700
700
#3F6873
oklch(49.2% 0.049 216.7)
-
Step 800
800
#34555E
oklch(42.8% 0.041 216.9)
-
Step 900
900
#2E464D
oklch(37.7% 0.032 218)
-
Step 950
950
#1B292D
oklch(27% 0.02 217.4)
#648D99 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) | #858A9A | 0.043 |
| Deuteranopia (no green cones) | #7D8499 | 0.039 |
| Tritanopia (no blue cones) | #519191 | 0.028 |
| Achromatopsia (no color) | #878787 | 0.049 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #648D99
#648D99
oklch(61.8% 0.049 217.9)
- #A07C71
#A07C71
oklch(61.8% 0.048 37.7)
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 #648D99, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Slate Gray #778899 ΔE 0.026
- Steel #738595 ΔE 0.027
- Blue Grey #758DA3 ΔE 0.027
- Steel Grey #6F828A ΔE 0.033
- Silver Lake Blue #778DA9 ΔE 0.036
- Slate Gray #708090 ΔE 0.037
- Dusty Blue #5A86AD ΔE 0.043
- Dusty Teal #4C9085 ΔE 0.045
Use #648D99 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.