#649BBF
Closest named color: Greyblue (#77A1B5). oklch(66.5% 0.079 238.3), rgb(100, 155, 191).
Aa
Black text reads best on this color (6.98:1).
About this color
#649BBF is a medium-light, moderately saturated blue. In OKLCH its lightness is 67%, its chroma 0.079 and its hue 238°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.034 away. Black text reads best on it, at 6.98:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.079) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 6.98:1 |
| White text | 3.00:1 |
Values
| HEX | #649BBF |
| RGB | rgb(100, 155, 191) |
| HSL | hsl(204, 42%, 57%) |
| OKLCH | oklch(66.5% 0.079 238.3) |
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 #649BBF | 3.00:1 | AA large text | Lc -62.0 | Content text, not long reading |
| Black text on #649BBF | 6.98:1 | AA | Lc 47.4 | Large or bold text, headings |
| #649BBF text on white | 3.00:1 | AA large text | Lc 56.7 | Large or bold text, headings |
| #649BBF 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E3EBF1
oklch(93.6% 0.012 239.9)
-
Step 200
200
#CDDCE6
oklch(88.6% 0.021 236.8)
-
Step 300
300
#AAC5D7
oklch(80.9% 0.039 237.2)
-
Step 400
400
#7CA7C3
oklch(70.7% 0.062 237.3)
-
Step 500
500 (this color)
#649BBF
oklch(66.5% 0.079 238.3)
-
Step 600
600
#3E7AA0
oklch(55.6% 0.086 238.7)
-
Step 700
700
#2F6789
oklch(49.1% 0.08 238.1)
-
Step 800
800
#28546F
oklch(42.7% 0.066 238)
-
Step 900
900
#26455A
oklch(37.6% 0.052 239.7)
-
Step 950
950
#172935
oklch(27.1% 0.033 238.8)
#649BBF 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) | #8B9AC1 | 0.047 |
| Deuteranopia (no green cones) | #7E90BE | 0.040 |
| Tritanopia (no blue cones) | #3AA4A7 | 0.062 |
| Achromatopsia (no color) | #959595 | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #649BBF
#649BBF
oklch(66.5% 0.079 238.3)
- #B98863
#B98863
oklch(66.6% 0.079 57.9)
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 #649BBF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.034
- Faded Blue #658CBB ΔE 0.041
- Silver Lake Blue #778DA9 ΔE 0.045
- Blue Grey #758DA3 ΔE 0.049
- Cadet Blue #5F9EA0 ΔE 0.052
- Bluegrey #85A3B2 ΔE 0.052
- Cool Gray #8D99AE ΔE 0.052
- Bluey Grey #89A0B0 ΔE 0.052
Use #649BBF 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.