#284C95
Closest named color: Cobalt (#1E488F). oklch(43.2% 0.127 262.6), rgb(40, 76, 149).
Aa
White text reads best on this color (8.20:1).
About this color
#284C95 is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.127 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.018 away. White text reads best on it, at 8.20:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.127) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.55:1 |
| White text | 8.20:1 |
Values
| HEX | #284C95 |
| RGB | rgb(40, 76, 149) |
| HSL | hsl(220, 58%, 37%) |
| OKLCH | oklch(43.2% 0.127 262.6) |
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 #284C95 | 8.20:1 | AAA | Lc -92.7 | Preferred for body text |
| Black text on #284C95 | 2.55:1 | Fails | Lc 16.0 | Dividers and decoration only |
| #284C95 text on white | 8.20:1 | AAA | Lc 88.0 | Fine for body text |
| #284C95 text on black | 2.55:1 | Fails | Lc -14.1 | 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 800.
-
Step 50
50
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EAF9
oklch(93.5% 0.022 263.2)
-
Step 200
200
#CBDAF5
oklch(88.6% 0.041 262.3)
-
Step 300
300
#A7C1F1
oklch(80.8% 0.074 262.5)
-
Step 400
400
#78A0EB
oklch(70.8% 0.119 262.3)
-
Step 500
500
#5686E4
oklch(63.1% 0.151 262.5)
-
Step 600
600
#3C6DD2
oklch(55.5% 0.165 262.8)
-
Step 700
700
#2E5BB6
oklch(49.1% 0.153 262.4)
-
Step 800
800 (this color)
#284C95
oklch(43.2% 0.127 262.6)
-
Step 900
900
#243F76
oklch(37.7% 0.1 262.9)
-
Step 950
950
#152545
oklch(26.9% 0.064 262.8)
#284C95 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) | #245498 | 0.022 |
| Deuteranopia (no green cones) | #054A94 | 0.024 |
| Tritanopia (no blue cones) | #005D69 | 0.101 |
| Achromatopsia (no color) | #4F4F4F | 0.127 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #284C95
#284C95
oklch(43.2% 0.127 262.6)
- #684B00
#684B00
oklch(43.3% 0.089 83)
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 #284C95, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.018
- Dusk Blue #26538D ΔE 0.026
- Light Navy #155084 ΔE 0.035
- Blueberry #464196 ΔE 0.044
- Deep Sea Blue #015482 ΔE 0.047
- Light Navy Blue #2E5A88 ΔE 0.050
- Denim Blue #3B5B92 ΔE 0.052
- Dark Slate Blue #483D8B ΔE 0.054
Use #284C95 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.