#282BA0
Closest named color: Sapphire (#2138AB). oklch(37.8% 0.183 272.4), rgb(40, 43, 160).
Aa
White text reads best on this color (10.80:1).
About this color
#282BA0 is a dark, vivid blue. In OKLCH its lightness is 38%, its chroma 0.183 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Sapphire (#2138AB), ΔE 0.033 away. White text reads best on it, at 10.80:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | vivid (0.183) |
| Temperature | cool |
| Nearest name | Sapphire (#2138AB) |
| Black text | 1.94:1 |
| White text | 10.80:1 |
Values
| HEX | #282BA0 |
| RGB | rgb(40, 43, 160) |
| HSL | hsl(239, 60%, 39%) |
| OKLCH | oklch(37.8% 0.183 272.4) |
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 #282BA0 | 10.80:1 | AAA | Lc -98.2 | Preferred for body text |
| Black text on #282BA0 | 1.94:1 | Fails | Lc 9.8 | Not readable |
| #282BA0 text on white | 10.80:1 | AAA | Lc 94.1 | Preferred for body text |
| #282BA0 text on black | 1.94:1 | Fails | Lc -8.4 | 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
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E3E9FF
oklch(93.6% 0.03 273.6)
-
Step 200
200
#CCD8FF
oklch(88.6% 0.055 271.8)
-
Step 300
300
#ABBDFF
oklch(80.9% 0.096 272.3)
-
Step 400
400
#8198FF
oklch(70.7% 0.153 272.5)
-
Step 500
500
#637AFF
oklch(63.2% 0.198 272.1)
-
Step 600
600
#4B56FF
oklch(55.6% 0.245 272.4)
-
Step 700
700
#3D2BFC
oklch(49.1% 0.283 272.5)
-
Step 800
800
#3029CB
oklch(42.7% 0.234 272.3)
-
Step 900
900 (this color)
#282BA0
oklch(37.8% 0.183 272.4)
-
Step 950
950
#161B5D
oklch(26.9% 0.116 272.4)
#282BA0 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) | #0043A3 | 0.054 |
| Deuteranopia (no green cones) | #00379E | 0.034 |
| Tritanopia (no blue cones) | #004C63 | 0.142 |
| Achromatopsia (no color) | #3D3D3D | 0.184 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #282BA0
#282BA0
oklch(37.8% 0.183 272.4)
- #504000
#504000
oklch(37.8% 0.077 92.8)
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 #282BA0, closest first.
No curated palette has a color within ΔE 0.04 of #282BA0.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sapphire #2138AB ΔE 0.033
- Indigo Blue #3A18B1 ΔE 0.042
- Ultramarine #2000B1 ΔE 0.054
- Royal #0C1793 ΔE 0.059
- Imperial Purple #480CA8 ΔE 0.061
- Cobalt Blue #030AA7 ΔE 0.064
- Cobalt #1E488F ΔE 0.074
- Blueberry #464196 ΔE 0.074
Use #282BA0 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.