#283776
Closest named color: Twilight Blue (#0A437A). oklch(36.1% 0.109 270.1), rgb(40, 55, 118).
Aa
White text reads best on this color (11.06:1).
About this color
#283776 is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.109 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.038 away. White text reads best on it, at 11.06:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.109) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.89:1 |
| White text | 11.06:1 |
Values
| HEX | #283776 |
| RGB | rgb(40, 55, 118) |
| HSL | hsl(228, 49%, 31%) |
| OKLCH | oklch(36.1% 0.109 270.1) |
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 #283776 | 11.06:1 | AAA | Lc -99.2 | Preferred for body text |
| Black text on #283776 | 1.89:1 | Fails | Lc 8.6 | Not readable |
| #283776 text on white | 11.06:1 | AAA | Lc 95.3 | Preferred for body text |
| #283776 text on black | 1.89:1 | Fails | Lc -7.3 | Not readable |
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 900.
-
Step 50
50
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAFA
oklch(93.6% 0.023 266.9)
-
Step 200
200
#CDD8F8
oklch(88.4% 0.046 270.4)
-
Step 300
300
#ACBFF6
oklch(81% 0.081 269.7)
-
Step 400
400
#819BF2
oklch(70.6% 0.131 270.2)
-
Step 500
500
#6380EE
oklch(63.2% 0.168 270)
-
Step 600
600
#4C66DC
oklch(55.6% 0.182 270.1)
-
Step 700
700
#3E54BF
oklch(49.1% 0.169 270.2)
-
Step 800
800
#33459A
oklch(42.6% 0.14 270.4)
-
Step 900
900 (this color)
#283776
oklch(36.1% 0.109 270.1)
-
Step 950
950
#1A2348
oklch(27% 0.07 270.8)
#283776 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) | #133F78 | 0.027 |
| Deuteranopia (no green cones) | #003875 | 0.032 |
| Tritanopia (no blue cones) | #004651 | 0.092 |
| Achromatopsia (no color) | #3C3C3C | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #283776
#283776
oklch(36.1% 0.109 270.1)
- #4C3B00
#4C3B00
oklch(36.1% 0.074 90.5)
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 #283776, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.038
- Marine Blue #01386A ΔE 0.040
- Prussian Blue #1D3557 ΔE 0.057
- Cobalt #1E488F ΔE 0.059
- Marine #042E60 ΔE 0.061
- Dark Slate Blue #483D8B ΔE 0.064
- Light Navy #155084 ΔE 0.072
- Dark Grey Blue #29465B ΔE 0.072
Use #283776 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.