#819EBF
Closest named color: Greyblue (#77A1B5). oklch(68.9% 0.059 251.9), rgb(129, 158, 191).
Aa
Black text reads best on this color (7.57:1).
About this color
#819EBF is a medium-light, muted blue. In OKLCH its lightness is 69%, its chroma 0.059 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.023 away. Black text reads best on it, at 7.57:1.
| Hue family | Blues |
| Lightness | medium-light (69%) |
| Chroma | muted (0.059) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 7.57:1 |
| White text | 2.77:1 |
Values
| HEX | #819EBF |
| RGB | rgb(129, 158, 191) |
| HSL | hsl(212, 33%, 63%) |
| OKLCH | oklch(68.9% 0.059 251.9) |
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 #819EBF | 2.77:1 | Fails | Lc -58.7 | Large or bold text, headings |
| Black text on #819EBF | 7.57:1 | AAA | Lc 50.6 | Large or bold text, headings |
| #819EBF text on white | 2.77:1 | Fails | Lc 53.4 | Large or bold text, headings |
| #819EBF text on black | 7.57:1 | AAA | Lc -48.4 | 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
#B0C3D8
oklch(80.9% 0.036 250.9)
-
Step 400
400 (this color)
#819EBF
oklch(68.9% 0.059 251.9)
-
Step 500
500
#688DB6
oklch(63.2% 0.075 251.6)
-
Step 600
600
#4F76A2
oklch(55.6% 0.082 252.3)
-
Step 700
700
#40638B
oklch(49.1% 0.076 252.6)
-
Step 800
800
#355171
oklch(42.7% 0.063 252.5)
-
Step 900
900
#2E435B
oklch(37.6% 0.049 252.4)
-
Step 950
950
#1B2735
oklch(26.8% 0.031 252.8)
#819EBF 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) | #929FC1 | 0.023 |
| Deuteranopia (no green cones) | #8A98BE | 0.019 |
| Tritanopia (no blue cones) | #6EA5A9 | 0.050 |
| Achromatopsia (no color) | #9B9B9B | 0.059 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #819EBF
#819EBF
oklch(68.9% 0.059 251.9)
- #B29673
#B29673
oklch(69% 0.059 72.8)
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 #819EBF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.023
- Bluey Grey #89A0B0 ΔE 0.026
- Cool Gray #8D99AE ΔE 0.027
- Bluegrey #85A3B2 ΔE 0.028
- Cool Steel #97A7B3 ΔE 0.046
- Cool Grey #95A3A6 ΔE 0.050
- Silver Lake Blue #778DA9 ΔE 0.054
- Blue Grey #758DA3 ΔE 0.059
Use #819EBF 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.