#819BB9
Closest named color: Cool Gray (#8D99AE). oklch(68% 0.053 252.2), rgb(129, 155, 185).
Aa
Black text reads best on this color (7.32:1).
About this color
#819BB9 is a medium-light, muted blue. In OKLCH its lightness is 68%, its chroma 0.053 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Gray (#8D99AE), ΔE 0.021 away. Black text reads best on it, at 7.32:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | muted (0.053) |
| Temperature | cool |
| Nearest name | Cool Gray (#8D99AE) |
| Black text | 7.32:1 |
| White text | 2.86:1 |
Values
| HEX | #819BB9 |
| RGB | rgb(129, 155, 185) |
| HSL | hsl(212, 29%, 62%) |
| OKLCH | oklch(68% 0.053 252.2) |
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 #819BB9 | 2.86:1 | Fails | Lc -60.2 | Content text, not long reading |
| Black text on #819BB9 | 7.32:1 | AAA | Lc 49.2 | Large or bold text, headings |
| #819BB9 text on white | 2.86:1 | Fails | Lc 54.9 | Large or bold text, headings |
| #819BB9 text on black | 7.32:1 | AAA | Lc -47.0 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E5EAF0
oklch(93.5% 0.01 252.8)
-
Step 200
200
#D1DAE5
oklch(88.5% 0.018 253.4)
-
Step 300
300
#B2C2D6
oklch(80.8% 0.033 254)
-
Step 400
400 (this color)
#819BB9
oklch(68% 0.053 252.2)
-
Step 500
500
#6B8CB2
oklch(63% 0.069 252.4)
-
Step 600
600
#53769E
oklch(55.6% 0.074 252.4)
-
Step 700
700
#436387
oklch(49.1% 0.069 252.1)
-
Step 800
800
#38516E
oklch(42.8% 0.057 252.8)
-
Step 900
900
#304359
oklch(37.7% 0.045 252.6)
-
Step 950
950
#1C2734
oklch(26.9% 0.029 253)
#819BB9 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) | #909CBA | 0.020 |
| Deuteranopia (no green cones) | #8996B8 | 0.016 |
| Tritanopia (no blue cones) | #71A2A5 | 0.046 |
| Achromatopsia (no color) | #989898 | 0.053 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #819BB9
#819BB9
oklch(68% 0.053 252.2)
- #AD9474
#AD9474
oklch(68.1% 0.054 73.6)
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 #819BB9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Gray #8D99AE ΔE 0.021
- Greyblue #77A1B5 ΔE 0.022
- Bluey Grey #89A0B0 ΔE 0.025
- Bluegrey #85A3B2 ΔE 0.029
- Silver Lake Blue #778DA9 ΔE 0.044
- Cool Grey #95A3A6 ΔE 0.049
- Blue Grey #758DA3 ΔE 0.049
- Cool Steel #97A7B3 ΔE 0.049
Use #819BB9 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.