#649BBD
Closest named color: Greyblue (#77A1B5). oklch(66.4% 0.077 236.7), rgb(100, 155, 189).
Aa
Black text reads best on this color (6.96:1).
About this color
#649BBD is a medium-light, moderately saturated blue. In OKLCH its lightness is 66%, its chroma 0.077 and its hue 237°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.032 away. Black text reads best on it, at 6.96:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.077) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 6.96:1 |
| White text | 3.01:1 |
Values
| HEX | #649BBD |
| RGB | rgb(100, 155, 189) |
| HSL | hsl(203, 40%, 57%) |
| OKLCH | oklch(66.4% 0.077 236.7) |
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 #649BBD | 3.01:1 | AA large text | Lc -62.1 | Content text, not long reading |
| Black text on #649BBD | 6.96:1 | AA | Lc 47.3 | Large or bold text, headings |
| #649BBD text on white | 3.01:1 | AA large text | Lc 56.8 | Large or bold text, headings |
| #649BBD text on black | 6.96:1 | AA | Lc -45.0 | 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
#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
#AAC5D6
oklch(80.9% 0.038 235.6)
-
Step 400
400
#7DA7C2
oklch(70.8% 0.06 236.9)
-
Step 500
500 (this color)
#649BBD
oklch(66.4% 0.077 236.7)
-
Step 600
600
#3E7B9E
oklch(55.7% 0.083 236.1)
-
Step 700
700
#306787
oklch(49.1% 0.077 236.8)
-
Step 800
800
#28546E
oklch(42.6% 0.065 236.9)
-
Step 900
900
#264659
oklch(37.8% 0.05 236.2)
-
Step 950
950
#172934
oklch(27.1% 0.031 236.4)
#649BBD 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) | #8B9ABF | 0.047 |
| Deuteranopia (no green cones) | #7F90BC | 0.041 |
| Tritanopia (no blue cones) | #3BA4A6 | 0.061 |
| Achromatopsia (no color) | #949494 | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #649BBD
#649BBD
oklch(66.4% 0.077 236.7)
- #B88865
#B88865
oklch(66.5% 0.076 57.1)
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 #649BBD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.032
- Faded Blue #658CBB ΔE 0.042
- Silver Lake Blue #778DA9 ΔE 0.044
- Blue Grey #758DA3 ΔE 0.048
- Cadet Blue #5F9EA0 ΔE 0.049
- Bluegrey #85A3B2 ΔE 0.051
- Cool Gray #8D99AE ΔE 0.051
- Bluey Grey #89A0B0 ΔE 0.051
Use #649BBD 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.