#284475
Closest named color: Twilight Blue (#0A437A). oklch(39.1% 0.09 260.8), rgb(40, 68, 117).
Aa
White text reads best on this color (9.65:1).
About this color
#284475 is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.090 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.025 away. White text reads best on it, at 9.65:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.17:1 |
| White text | 9.65:1 |
Values
| HEX | #284475 |
| RGB | rgb(40, 68, 117) |
| HSL | hsl(218, 49%, 31%) |
| OKLCH | oklch(39.1% 0.09 260.8) |
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 #284475 | 9.65:1 | AAA | Lc -96.4 | Preferred for body text |
| Black text on #284475 | 2.17:1 | Fails | Lc 11.8 | Not readable |
| #284475 text on white | 9.65:1 | AAA | Lc 92.2 | Preferred for body text |
| #284475 text on black | 2.17:1 | Fails | Lc -10.2 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E3EAF7
oklch(93.6% 0.019 263)
-
Step 200
200
#CBDAF3
oklch(88.5% 0.038 260.7)
-
Step 300
300
#A8C2ED
oklch(80.9% 0.067 260.4)
-
Step 400
400
#7AA1E4
oklch(70.7% 0.108 260.9)
-
Step 500
500
#5788DC
oklch(63.1% 0.138 260.5)
-
Step 600
600
#3D70CA
oklch(55.6% 0.15 260.8)
-
Step 700
700
#2F5DAF
oklch(49.1% 0.14 260.9)
-
Step 800
800
#284C8D
oklch(42.6% 0.116 261.2)
-
Step 900
900 (this color)
#284475
oklch(39.1% 0.09 260.8)
-
Step 950
950
#162642
oklch(27% 0.057 260.9)
#284475 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) | #2E4877 | 0.015 |
| Deuteranopia (no green cones) | #234174 | 0.011 |
| Tritanopia (no blue cones) | #004F56 | 0.076 |
| Achromatopsia (no color) | #454545 | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #284475
#284475
oklch(39.1% 0.09 260.8)
- #5B4000
#5B4000
oklch(39.1% 0.081 81.5)
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 #284475, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.025
- Light Navy #155084 ΔE 0.040
- Cobalt #1E488F ΔE 0.043
- Dark Grey Blue #29465B ΔE 0.047
- Deep Sea Blue #015482 ΔE 0.050
- Marine Blue #01386A ΔE 0.054
- Dusk Blue #26538D ΔE 0.054
- Charcoal #264653 ΔE 0.062
Use #284475 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.