#819BBF
Closest named color: Cool Gray (#8D99AE). oklch(68.3% 0.061 256.6), rgb(129, 155, 191).
Aa
Black text reads best on this color (7.37:1).
About this color
#819BBF is a medium-light, muted blue. In OKLCH its lightness is 68%, its chroma 0.061 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Gray (#8D99AE), ΔE 0.027 away. Black text reads best on it, at 7.37:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | muted (0.061) |
| Temperature | cool |
| Nearest name | Cool Gray (#8D99AE) |
| Black text | 7.37:1 |
| White text | 2.84:1 |
Values
| HEX | #819BBF |
| RGB | rgb(129, 155, 191) |
| HSL | hsl(215, 33%, 63%) |
| OKLCH | oklch(68.3% 0.061 256.6) |
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 #819BBF | 2.84:1 | Fails | Lc -59.9 | Large or bold text, headings |
| Black text on #819BBF | 7.37:1 | AAA | Lc 49.5 | Large or bold text, headings |
| #819BBF text on white | 2.84:1 | Fails | Lc 54.6 | Large or bold text, headings |
| #819BBF text on black | 7.37:1 | AAA | Lc -47.3 | 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
#D0DAE7
oklch(88.5% 0.021 254.9)
-
Step 300
300
#B1C2DA
oklch(80.9% 0.039 257)
-
Step 400
400 (this color)
#819BBF
oklch(68.3% 0.061 256.6)
-
Step 500
500
#6B8BB9
oklch(63.1% 0.079 257.4)
-
Step 600
600
#5275A5
oklch(55.7% 0.085 256.5)
-
Step 700
700
#43628D
oklch(49.1% 0.079 256.7)
-
Step 800
800
#375072
oklch(42.7% 0.065 256.3)
-
Step 900
900
#30435C
oklch(37.8% 0.049 255.5)
-
Step 950
950
#1C2736
oklch(27% 0.032 256.3)
#819BBF 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) | #8E9CC1 | 0.018 |
| Deuteranopia (no green cones) | #8796BE | 0.015 |
| Tritanopia (no blue cones) | #6EA3A7 | 0.054 |
| Achromatopsia (no color) | #999999 | 0.061 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #819BBF
#819BBF
oklch(68.3% 0.061 256.6)
- #AF956F
#AF956F
oklch(68.4% 0.061 76.9)
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 #819BBF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Gray #8D99AE ΔE 0.027
- Greyblue #77A1B5 ΔE 0.028
- Bluey Grey #89A0B0 ΔE 0.032
- Bluegrey #85A3B2 ΔE 0.035
- Silver Lake Blue #778DA9 ΔE 0.048
- Cool Steel #97A7B3 ΔE 0.053
- Blue Grey #758DA3 ΔE 0.054
- Cool Grey #95A3A6 ΔE 0.055
Use #819BBF 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.