#819BC4
Closest named color: Cool Gray (#8D99AE). oklch(68.5% 0.068 259.4), rgb(129, 155, 196).
Aa
Black text reads best on this color (7.41:1).
About this color
#819BC4 is a medium-light, muted blue. In OKLCH its lightness is 68%, its chroma 0.068 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Gray (#8D99AE), ΔE 0.034 away. Black text reads best on it, at 7.41:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | muted (0.068) |
| Temperature | cool |
| Nearest name | Cool Gray (#8D99AE) |
| Black text | 7.41:1 |
| White text | 2.83:1 |
Values
| HEX | #819BC4 |
| RGB | rgb(129, 155, 196) |
| HSL | hsl(217, 36%, 64%) |
| OKLCH | oklch(68.5% 0.068 259.4) |
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 #819BC4 | 2.83:1 | Fails | Lc -59.6 | Large or bold text, headings |
| Black text on #819BC4 | 7.41:1 | AAA | Lc 49.7 | Large or bold text, headings |
| #819BC4 text on white | 2.83:1 | Fails | Lc 54.3 | Large or bold text, headings |
| #819BC4 text on black | 7.41:1 | AAA | Lc -47.5 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E5EAF2
oklch(93.6% 0.012 259.8)
-
Step 200
200
#D0DAE9
oklch(88.5% 0.023 258.4)
-
Step 300
300
#B1C2DD
oklch(81% 0.043 259.6)
-
Step 400
400 (this color)
#819BC4
oklch(68.5% 0.068 259.4)
-
Step 500
500
#6A8ABE
oklch(63% 0.087 259.9)
-
Step 600
600
#5274AA
oklch(55.7% 0.093 259.4)
-
Step 700
700
#426192
oklch(49.1% 0.087 259.2)
-
Step 800
800
#374F76
oklch(42.6% 0.072 259.8)
-
Step 900
900
#2F4260
oklch(37.7% 0.057 259.3)
-
Step 950
950
#1C2738
oklch(27.1% 0.035 258.9)
#819BC4 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) | #8D9DC6 | 0.017 |
| Deuteranopia (no green cones) | #8697C3 | 0.012 |
| Tritanopia (no blue cones) | #6DA4A9 | 0.060 |
| Achromatopsia (no color) | #9A9A9A | 0.068 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #819BC4
#819BC4
oklch(68.5% 0.068 259.4)
- #B0956A
#B0956A
oklch(68.4% 0.067 78.9)
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 #819BC4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Gray #8D99AE ΔE 0.034
- Greyblue #77A1B5 ΔE 0.035
- Bluey Grey #89A0B0 ΔE 0.038
- Bluegrey #85A3B2 ΔE 0.041
- Silver Lake Blue #778DA9 ΔE 0.052
- Cool Steel #97A7B3 ΔE 0.057
- Faded Blue #658CBB ΔE 0.057
- Blue Grey #758DA3 ΔE 0.059
Use #819BC4 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.