#284598
Closest named color: Cobalt (#1E488F). oklch(41.9% 0.14 266), rgb(40, 69, 152).
Aa
White text reads best on this color (8.76:1).
About this color
#284598 is a dark, vivid blue. In OKLCH its lightness is 42%, its chroma 0.140 and its hue 266°. 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 8.76:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | vivid (0.140) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.39:1 |
| White text | 8.76:1 |
Values
| HEX | #284598 |
| RGB | rgb(40, 69, 152) |
| HSL | hsl(224, 58%, 38%) |
| OKLCH | oklch(41.9% 0.14 266) |
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 #284598 | 8.76:1 | AAA | Lc -94.1 | Preferred for body text |
| Black text on #284598 | 2.39:1 | Fails | Lc 14.4 | Not readable |
| #284598 text on white | 8.76:1 | AAA | Lc 89.6 | Fine for body text |
| #284598 text on black | 2.39:1 | Fails | Lc -12.6 | 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
#E2EAFA
oklch(93.6% 0.023 264.5)
-
Step 200
200
#CBD9F8
oklch(88.5% 0.045 266.2)
-
Step 300
300
#A8C0F7
oklch(80.9% 0.083 266.3)
-
Step 400
400
#7A9DF2
oklch(70.6% 0.131 266.1)
-
Step 500
500
#5982EE
oklch(63% 0.168 266.1)
-
Step 600
600
#4069DC
oklch(55.6% 0.182 265.9)
-
Step 700
700
#3357BF
oklch(49.2% 0.169 265.9)
-
Step 800
800 (this color)
#284598
oklch(41.9% 0.14 266)
-
Step 900
900
#263D7B
oklch(37.7% 0.109 266)
-
Step 950
950
#162448
oklch(26.9% 0.07 265.9)
#284598 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) | #05509B | 0.032 |
| Deuteranopia (no green cones) | #004696 | 0.025 |
| Tritanopia (no blue cones) | #005967 | 0.113 |
| Achromatopsia (no color) | #4B4B4B | 0.141 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #284598
#284598
oklch(41.9% 0.14 266)
- #614800
#614800
oklch(41.7% 0.085 85.8)
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 #284598, 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 0.039
- Dusk Blue #26538D ΔE 0.045
- Sapphire #2138AB ΔE 0.046
- Dark Slate Blue #483D8B ΔE 0.049
- Light Navy #155084 ΔE 0.050
- Twilight Blue #0A437A ΔE 0.057
- Deep Sea Blue #015482 ΔE 0.063
Use #284598 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.