#284191
Closest named color: Cobalt (#1E488F). oklch(40.4% 0.136 267), rgb(40, 65, 145).
Aa
White text reads best on this color (9.31:1).
About this color
#284191 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.136 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.020 away. White text reads best on it, at 9.31:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.136) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.25:1 |
| White text | 9.31:1 |
Values
| HEX | #284191 |
| RGB | rgb(40, 65, 145) |
| HSL | hsl(226, 57%, 36%) |
| OKLCH | oklch(40.4% 0.136 267) |
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 #284191 | 9.31:1 | AAA | Lc -95.5 | Preferred for body text |
| Black text on #284191 | 2.25:1 | Fails | Lc 12.9 | Not readable |
| #284191 text on white | 9.31:1 | AAA | Lc 91.1 | Preferred for body text |
| #284191 text on black | 2.25:1 | Fails | Lc -11.2 | 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 800.
-
Step 50
50
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAFA
oklch(93.6% 0.023 266.9)
-
Step 200
200
#CCD9F7
oklch(88.5% 0.044 266.9)
-
Step 300
300
#AAC0F5
oklch(81% 0.079 267.1)
-
Step 400
400
#7D9DF0
oklch(70.7% 0.127 267.1)
-
Step 500
500
#5D82EB
oklch(63.1% 0.163 267.1)
-
Step 600
600
#4569D9
oklch(55.6% 0.176 267.1)
-
Step 700
700
#3757BC
oklch(49.1% 0.163 266.9)
-
Step 800
800 (this color)
#284191
oklch(40.4% 0.136 267)
-
Step 900
900
#283D79
oklch(37.7% 0.105 266.8)
-
Step 950
950
#182447
oklch(27% 0.067 267.5)
#284191 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) | #034C94 | 0.034 |
| Deuteranopia (no green cones) | #00428F | 0.027 |
| Tritanopia (no blue cones) | #005462 | 0.109 |
| Achromatopsia (no color) | #474747 | 0.136 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #284191
#284191
oklch(40.4% 0.136 267)
- #5C4500
#5C4500
oklch(40.4% 0.083 86.9)
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 #284191, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.020
- Blueberry #464196 ΔE 0.042
- Dark Slate Blue #483D8B ΔE 0.045
- Twilight Blue #0A437A ΔE 0.047
- Sapphire #2138AB ΔE 0.049
- Light Navy #155084 ΔE 0.051
- Dusk Blue #26538D ΔE 0.052
- Deep Sea Blue #015482 ΔE 0.064
Use #284191 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.