#819BCF
Closest named color: Greyblue (#77A1B5). oklch(68.9% 0.083 263.8), rgb(129, 155, 207).
Aa
Black text reads best on this color (7.52:1).
About this color
#819BCF is a medium-light, moderately saturated blue. In OKLCH its lightness is 69%, its chroma 0.083 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.049 away. Black text reads best on it, at 7.52:1.
| Hue family | Blues |
| Lightness | medium-light (69%) |
| Chroma | moderately saturated (0.083) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 7.52:1 |
| White text | 2.79:1 |
Values
| HEX | #819BCF |
| RGB | rgb(129, 155, 207) |
| HSL | hsl(220, 45%, 66%) |
| OKLCH | oklch(68.9% 0.083 263.8) |
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 #819BCF | 2.79:1 | Fails | Lc -59.0 | Large or bold text, headings |
| Black text on #819BCF | 7.52:1 | AAA | Lc 50.3 | Large or bold text, headings |
| #819BCF text on white | 2.79:1 | Fails | Lc 53.7 | Large or bold text, headings |
| #819BCF text on black | 7.52:1 | AAA | Lc -48.1 | 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 400.
-
Step 50
50
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E5EAF4
oklch(93.6% 0.015 264.5)
-
Step 200
200
#D0D9ED
oklch(88.5% 0.029 266.4)
-
Step 300
300
#B0C1E3
oklch(80.9% 0.052 264.2)
-
Step 400
400 (this color)
#819BCF
oklch(68.9% 0.083 263.8)
-
Step 500
500
#6888CA
oklch(63.1% 0.107 263.9)
-
Step 600
600
#5071B6
oklch(55.6% 0.114 263.7)
-
Step 700
700
#415E9D
oklch(49% 0.107 264.2)
-
Step 800
800
#364D7F
oklch(42.6% 0.088 264.3)
-
Step 900
900
#2E4166
oklch(37.7% 0.068 262.8)
-
Step 950
950
#1B263C
oklch(27% 0.044 263.4)
#819BCF 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) | #899FD1 | 0.016 |
| Deuteranopia (no green cones) | #8197CE | 0.011 |
| Tritanopia (no blue cones) | #68A6AD | 0.074 |
| Achromatopsia (no color) | #9B9B9B | 0.083 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #819BCF
#819BCF
oklch(68.9% 0.083 263.8)
- #B4975E
#B4975E
oklch(69% 0.083 83.4)
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 #819BCF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.049
- Cool Gray #8D99AE ΔE 0.049
- Bluey Grey #89A0B0 ΔE 0.053
- Bluegrey #85A3B2 ΔE 0.055
- Cornflower Blue #6495ED ΔE 0.061
- Faded Blue #658CBB ΔE 0.061
- Perrywinkle #8F8CE7 ΔE 0.062
- Silver Lake Blue #778DA9 ΔE 0.064
Use #819BCF 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.