#649BBB
Closest named color: Greyblue (#77A1B5). oklch(66.4% 0.075 235.1), rgb(100, 155, 187).
Aa
Black text reads best on this color (6.94:1).
About this color
#649BBB is a medium-light, moderately saturated blue. In OKLCH its lightness is 66%, its chroma 0.075 and its hue 235°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.031 away. Black text reads best on it, at 6.94:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 6.94:1 |
| White text | 3.02:1 |
Values
| HEX | #649BBB |
| RGB | rgb(100, 155, 187) |
| HSL | hsl(202, 39%, 56%) |
| OKLCH | oklch(66.4% 0.075 235.1) |
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 #649BBB | 3.02:1 | AA large text | Lc -62.2 | Content text, not long reading |
| Black text on #649BBB | 6.94:1 | AA | Lc 47.2 | Large or bold text, headings |
| #649BBB text on white | 3.02:1 | AA large text | Lc 56.9 | Large or bold text, headings |
| #649BBB text on black | 6.94:1 | AA | Lc -44.9 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E3EBF0
oklch(93.5% 0.011 234.8)
-
Step 200
200
#CDDCE5
oklch(88.6% 0.02 233.9)
-
Step 300
300
#ABC5D5
oklch(80.9% 0.036 234.9)
-
Step 400
400
#7DA7C0
oklch(70.7% 0.058 234.8)
-
Step 500
500 (this color)
#649BBB
oklch(66.4% 0.075 235.1)
-
Step 600
600
#3E7B9C
oklch(55.6% 0.081 234.5)
-
Step 700
700
#306786
oklch(49% 0.076 236)
-
Step 800
800
#29546D
oklch(42.6% 0.063 236.4)
-
Step 900
900
#264658
oklch(37.8% 0.049 234.7)
-
Step 950
950
#172933
oklch(27% 0.03 233.8)
#649BBB 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) | #8C9ABD | 0.048 |
| Deuteranopia (no green cones) | #8090BB | 0.042 |
| Tritanopia (no blue cones) | #3DA3A5 | 0.057 |
| Achromatopsia (no color) | #949494 | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #649BBB
#649BBB
oklch(66.4% 0.075 235.1)
- #B88767
#B88767
oklch(66.4% 0.075 54.2)
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 #649BBB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.031
- Silver Lake Blue #778DA9 ΔE 0.043
- Faded Blue #658CBB ΔE 0.043
- Cadet Blue #5F9EA0 ΔE 0.046
- Blue Grey #758DA3 ΔE 0.046
- Bluegrey #85A3B2 ΔE 0.049
- Bluey Grey #89A0B0 ΔE 0.050
- Cool Gray #8D99AE ΔE 0.050
Use #649BBB 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.