#284280
Closest named color: Twilight Blue (#0A437A). oklch(39.4% 0.109 264.7), rgb(40, 66, 128).
Aa
White text reads best on this color (9.62:1).
About this color
#284280 is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.109 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.026 away. White text reads best on it, at 9.62:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.109) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.18:1 |
| White text | 9.62:1 |
Values
| HEX | #284280 |
| RGB | rgb(40, 66, 128) |
| HSL | hsl(222, 52%, 33%) |
| OKLCH | oklch(39.4% 0.109 264.7) |
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 #284280 | 9.62:1 | AAA | Lc -96.3 | Preferred for body text |
| Black text on #284280 | 2.18:1 | Fails | Lc 11.9 | Not readable |
| #284280 text on white | 9.62:1 | AAA | Lc 92.0 | Preferred for body text |
| #284280 text on black | 2.18:1 | Fails | Lc -10.4 | 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
#F2F6FD
oklch(97.2% 0.01 261.8)
-
Step 100
100
#E2EAFA
oklch(93.6% 0.023 264.5)
-
Step 200
200
#CAD9F8
oklch(88.4% 0.046 264.9)
-
Step 300
300
#A7C0F7
oklch(80.9% 0.083 265.6)
-
Step 400
400
#789EF2
oklch(70.7% 0.131 264.8)
-
Step 500
500
#5683EE
oklch(63.1% 0.168 264.8)
-
Step 600
600
#3C6ADC
oklch(55.6% 0.182 264.6)
-
Step 700
700
#2F57BF
oklch(49% 0.17 264.9)
-
Step 800
800
#27489B
oklch(42.7% 0.141 264.7)
-
Step 900
900 (this color)
#284280
oklch(39.4% 0.109 264.7)
-
Step 950
950
#152448
oklch(26.9% 0.07 265)
#284280 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) | #224982 | 0.020 |
| Deuteranopia (no green cones) | #11417F | 0.021 |
| Tritanopia (no blue cones) | #00505A | 0.090 |
| Achromatopsia (no color) | #454545 | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #284280
#284280
oklch(39.4% 0.109 264.7)
- #5A4200
#5A4200
oklch(39.5% 0.081 85)
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 #284280, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.026
- Cobalt #1E488F ΔE 0.028
- Light Navy #155084 ΔE 0.040
- Dark Slate Blue #483D8B ΔE 0.050
- Dusk Blue #26538D ΔE 0.051
- Deep Sea Blue #015482 ΔE 0.054
- Blueberry #464196 ΔE 0.056
- Marine Blue #01386A ΔE 0.059
Use #284280 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.