#284BAC
Closest named color: Sapphire (#2138AB). oklch(44.7% 0.161 265.3), rgb(40, 75, 172).
Aa
White text reads best on this color (7.79:1).
About this color
#284BAC is a dark, vivid blue. In OKLCH its lightness is 45%, its chroma 0.161 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Sapphire (#2138AB), ΔE 0.047 away. White text reads best on it, at 7.79:1.
| Hue family | Blues |
| Lightness | dark (45%) |
| Chroma | vivid (0.161) |
| Temperature | cool |
| Nearest name | Sapphire (#2138AB) |
| Black text | 2.69:1 |
| White text | 7.79:1 |
Values
| HEX | #284BAC |
| RGB | rgb(40, 75, 172) |
| HSL | hsl(224, 62%, 42%) |
| OKLCH | oklch(44.7% 0.161 265.3) |
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 #284BAC | 7.79:1 | AAA | Lc -91.3 | Preferred for body text |
| Black text on #284BAC | 2.69:1 | Fails | Lc 17.4 | Dividers and decoration only |
| #284BAC text on white | 7.79:1 | AAA | Lc 86.6 | Fine for body text |
| #284BAC text on black | 2.69:1 | Fails | Lc -15.5 | Dividers and decoration only |
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 800.
-
Step 50
50
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E1EAFD
oklch(93.6% 0.028 265.4)
-
Step 200
200
#C9D9FD
oklch(88.5% 0.053 266.4)
-
Step 300
300
#A3C0FE
oklch(80.9% 0.094 265)
-
Step 400
400
#739CFE
oklch(70.6% 0.151 265.6)
-
Step 500
500
#5080FC
oklch(63.1% 0.192 265.3)
-
Step 600
600
#3665EB
oklch(55.5% 0.209 265.3)
-
Step 700
700
#2A53CD
oklch(49.2% 0.195 265.4)
-
Step 800
800 (this color)
#284BAC
oklch(44.7% 0.161 265.3)
-
Step 900
900
#203B83
oklch(37.6% 0.126 265.3)
-
Step 950
950
#13234D
oklch(26.9% 0.08 265.6)
#284BAC 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) | #0058AF | 0.035 |
| Deuteranopia (no green cones) | #004CAA | 0.022 |
| Tritanopia (no blue cones) | #006374 | 0.126 |
| Achromatopsia (no color) | #525252 | 0.161 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #284BAC
#284BAC
oklch(44.7% 0.161 265.3)
- #6B5000
#6B5000
oklch(44.7% 0.092 86.1)
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 #284BAC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sapphire #2138AB ΔE 0.047
- Blue Blue #2242C7 ΔE 0.048
- Cobalt #1E488F ΔE 0.049
- Blueberry #464196 ΔE 0.053
- Dusk Blue #26538D ΔE 0.057
- Majorelle Blue #3F37C9 ΔE 0.065
- Denim Blue #3B5B92 ΔE 0.069
- Dark Slate Blue #483D8B ΔE 0.071
Use #284BAC 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.