#819BBB
Closest named color: Cool Gray (#8D99AE). oklch(68.1% 0.056 253.8), rgb(129, 155, 187).
Aa
Black text reads best on this color (7.33:1).
About this color
#819BBB is a medium-light, muted blue. In OKLCH its lightness is 68%, its chroma 0.056 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Gray (#8D99AE), ΔE 0.023 away. Black text reads best on it, at 7.33:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | muted (0.056) |
| Temperature | cool |
| Nearest name | Cool Gray (#8D99AE) |
| Black text | 7.33:1 |
| White text | 2.86:1 |
Values
| HEX | #819BBB |
| RGB | rgb(129, 155, 187) |
| HSL | hsl(213, 30%, 62%) |
| OKLCH | oklch(68.1% 0.056 253.8) |
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 #819BBB | 2.86:1 | Fails | Lc -60.1 | Content text, not long reading |
| Black text on #819BBB | 7.33:1 | AAA | Lc 49.3 | Large or bold text, headings |
| #819BBB text on white | 2.86:1 | Fails | Lc 54.8 | Large or bold text, headings |
| #819BBB text on black | 7.33:1 | AAA | Lc -47.1 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E5EAF1
oklch(93.5% 0.011 256.7)
-
Step 200
200
#D1DAE6
oklch(88.5% 0.019 255.5)
-
Step 300
300
#B2C2D7
oklch(80.9% 0.035 255.2)
-
Step 400
400 (this color)
#819BBB
oklch(68.1% 0.056 253.8)
-
Step 500
500
#6B8CB4
oklch(63.1% 0.071 253.6)
-
Step 600
600
#5376A0
oklch(55.7% 0.077 253.6)
-
Step 700
700
#436389
oklch(49.2% 0.072 253.4)
-
Step 800
800
#37516F
oklch(42.8% 0.059 252.7)
-
Step 900
900
#30435A
oklch(37.7% 0.047 253.7)
-
Step 950
950
#1C2735
oklch(26.9% 0.03 254.7)
#819BBB 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) | #8F9CBD | 0.019 |
| Deuteranopia (no green cones) | #8996BA | 0.016 |
| Tritanopia (no blue cones) | #70A2A5 | 0.049 |
| Achromatopsia (no color) | #999999 | 0.056 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #819BBB
#819BBB
oklch(68.1% 0.056 253.8)
- #AE9472
#AE9472
oklch(68.1% 0.057 74.1)
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 #819BBB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Gray #8D99AE ΔE 0.023
- Greyblue #77A1B5 ΔE 0.024
- Bluey Grey #89A0B0 ΔE 0.027
- Bluegrey #85A3B2 ΔE 0.031
- Silver Lake Blue #778DA9 ΔE 0.045
- Cool Steel #97A7B3 ΔE 0.050
- Blue Grey #758DA3 ΔE 0.051
- Cool Grey #95A3A6 ΔE 0.051
Use #819BBB 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.