#648FA3
Closest named color: Blue Grey (#758DA3). oklch(62.6% 0.056 228.6), rgb(100, 143, 163).
Aa
Black text reads best on this color (5.99:1).
About this color
#648FA3 is a medium-light, muted teal or cyan. In OKLCH its lightness is 63%, its chroma 0.056 and its hue 229°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Grey (#758DA3), ΔE 0.021 away. Black text reads best on it, at 5.99:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (63%) |
| Chroma | muted (0.056) |
| Temperature | cool |
| Nearest name | Blue Grey (#758DA3) |
| Black text | 5.99:1 |
| White text | 3.50:1 |
Values
| HEX | #648FA3 |
| RGB | rgb(100, 143, 163) |
| HSL | hsl(199, 26%, 52%) |
| OKLCH | oklch(62.6% 0.056 228.6) |
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 #648FA3 | 3.50:1 | AA large text | Lc -68.0 | Content text, not long reading |
| Black text on #648FA3 | 5.99:1 | AA | Lc 41.6 | Non-text elements, placeholder text |
| #648FA3 text on white | 3.50:1 | AA large text | Lc 62.5 | Content text, not long reading |
| #648FA3 text on black | 5.99:1 | AA | Lc -39.2 | 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
#E5EBEE
oklch(93.6% 0.008 228.9)
-
Step 200
200
#CFDBE1
oklch(88.4% 0.015 229)
-
Step 300
300
#AFC4CF
oklch(80.8% 0.028 230.4)
-
Step 400
400
#85A6B6
oklch(70.6% 0.043 229)
-
Step 500
500 (this color)
#648FA3
oklch(62.6% 0.056 228.6)
-
Step 600
600
#4C7A90
oklch(55.5% 0.061 229.9)
-
Step 700
700
#3D677A
oklch(49.1% 0.056 228.7)
-
Step 800
800
#325463
oklch(42.6% 0.047 227.9)
-
Step 900
900
#2D4651
oklch(37.9% 0.036 227.4)
-
Step 950
950
#1A292F
oklch(27% 0.023 224.8)
#648FA3 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) | #858DA4 | 0.042 |
| Deuteranopia (no green cones) | #7B86A3 | 0.036 |
| Tritanopia (no blue cones) | #4D9595 | 0.040 |
| Achromatopsia (no color) | #898989 | 0.056 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #648FA3
#648FA3
oklch(62.6% 0.056 228.6)
- #A57E6B
#A57E6B
oklch(62.6% 0.056 47.2)
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 #648FA3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Grey #758DA3 ΔE 0.021
- Silver Lake Blue #778DA9 ΔE 0.027
- Light Slate Gray #778899 ΔE 0.028
- Steel #738595 ΔE 0.032
- Dusty Blue #5A86AD ΔE 0.037
- Faded Blue #658CBB ΔE 0.041
- Slate Gray #708090 ΔE 0.044
- Steel Grey #6F828A ΔE 0.044
Use #648FA3 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.