#909DDB
Closest named color: Periwinkle Blue (#8F99FB). oklch(70.9% 0.092 274.7), rgb(144, 157, 219).
Aa
Black text reads best on this color (8.03:1).
About this color
#909DDB is a medium-light, moderately saturated blue. In OKLCH its lightness is 71%, its chroma 0.092 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Periwinkle Blue (#8F99FB), ΔE 0.051 away. Black text reads best on it, at 8.03:1.
| Hue family | Blues |
| Lightness | medium-light (71%) |
| Chroma | moderately saturated (0.092) |
| Temperature | cool |
| Nearest name | Periwinkle Blue (#8F99FB) |
| Black text | 8.03:1 |
| White text | 2.61:1 |
Values
| HEX | #909DDB |
| RGB | rgb(144, 157, 219) |
| HSL | hsl(230, 51%, 71%) |
| OKLCH | oklch(70.9% 0.092 274.7) |
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 #909DDB | 2.61:1 | Fails | Lc -56.1 | Large or bold text, headings |
| Black text on #909DDB | 8.03:1 | AAA | Lc 53.0 | Large or bold text, headings |
| #909DDB text on white | 2.61:1 | Fails | Lc 51.0 | Large or bold text, headings |
| #909DDB text on black | 8.03:1 | AAA | Lc -50.9 | 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
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E6E9F5
oklch(93.5% 0.016 274.8)
-
Step 200
200
#D2D8EF
oklch(88.5% 0.032 274.1)
-
Step 300
300
#B5BEE6
oklch(80.8% 0.057 275.1)
-
Step 400
400 (this color)
#909DDB
oklch(70.9% 0.092 274.7)
-
Step 500
500
#7583D0
oklch(63.2% 0.117 274.7)
-
Step 600
600
#5E6BBD
oklch(55.6% 0.127 274.7)
-
Step 700
700
#4E59A3
oklch(49.1% 0.118 274.8)
-
Step 800
800
#404984
oklch(42.7% 0.098 274.9)
-
Step 900
900
#363D6A
oklch(37.6% 0.077 275.4)
-
Step 950
950
#1F243E
oklch(26.9% 0.049 274.4)
#909DDB 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) | #8AA3DE | 0.016 |
| Deuteranopia (no green cones) | #849DDA | 0.016 |
| Tritanopia (no blue cones) | #7BA9B3 | 0.082 |
| Achromatopsia (no color) | #A0A0A0 | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #909DDB
#909DDB
oklch(70.9% 0.092 274.7)
- #B3A15C
#B3A15C
oklch(70.9% 0.092 95.2)
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 #909DDB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Periwinkle Blue #8F99FB ΔE 0.051
- Perrywinkle #8F8CE7 ΔE 0.052
- Pale Purple #B790D4 ΔE 0.061
- Cornflower Blue #6495ED ΔE 0.066
- Cool Gray #8D99AE ΔE 0.066
- Bluey Grey #89A0B0 ΔE 0.069
- Bluegrey #85A3B2 ΔE 0.071
- Greyblue #77A1B5 ΔE 0.071
Use #909DDB 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.