#649CB8
Closest named color: Greyblue (#77A1B5). oklch(66.5% 0.072 231), rgb(100, 156, 184).
Aa
Black text reads best on this color (6.98:1).
About this color
#649CB8 is a medium-light, moderately saturated blue. In OKLCH its lightness is 66%, its chroma 0.072 and its hue 231°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.028 away. Black text reads best on it, at 6.98:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.072) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 6.98:1 |
| White text | 3.00:1 |
Values
| HEX | #649CB8 |
| RGB | rgb(100, 156, 184) |
| HSL | hsl(200, 37%, 56%) |
| OKLCH | oklch(66.5% 0.072 231) |
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 #649CB8 | 3.00:1 | AA large text | Lc -62.0 | Content text, not long reading |
| Black text on #649CB8 | 6.98:1 | AA | Lc 47.4 | Large or bold text, headings |
| #649CB8 text on white | 3.00:1 | AA large text | Lc 56.6 | Large or bold text, headings |
| #649CB8 text on black | 6.98:1 | AA | Lc -45.1 | Large or bold text, headings |
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
#E3EBEF
oklch(93.5% 0.01 228.9)
-
Step 200
200
#CDDCE4
oklch(88.6% 0.02 230.7)
-
Step 300
300
#ABC5D4
oklch(80.9% 0.035 233.2)
-
Step 400
400
#7DA8BE
oklch(70.8% 0.056 230.8)
-
Step 500
500 (this color)
#649CB8
oklch(66.5% 0.072 231)
-
Step 600
600
#3E7C99
oklch(55.7% 0.078 230.7)
-
Step 700
700
#2F6883
oklch(49.1% 0.073 231.5)
-
Step 800
800
#28556A
oklch(42.7% 0.06 230.7)
-
Step 900
900
#264656
oklch(37.7% 0.047 231.6)
-
Step 950
950
#172932
oklch(27% 0.029 231)
#649CB8 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) | #8E9AB9 | 0.050 |
| Deuteranopia (no green cones) | #8291B8 | 0.044 |
| Tritanopia (no blue cones) | #3EA4A5 | 0.053 |
| Achromatopsia (no color) | #959595 | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #649CB8
#649CB8
oklch(66.5% 0.072 231)
- #B8876B
#B8876B
oklch(66.4% 0.072 50.8)
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 #649CB8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.028
- Cadet Blue #5F9EA0 ΔE 0.040
- Silver Lake Blue #778DA9 ΔE 0.044
- Blue Grey #758DA3 ΔE 0.046
- Bluegrey #85A3B2 ΔE 0.046
- Faded Blue #658CBB ΔE 0.047
- Bluey Grey #89A0B0 ΔE 0.047
- Cool Gray #8D99AE ΔE 0.049
Use #649CB8 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.