#283898
Closest named color: Sapphire (#2138AB). oklch(39.2% 0.157 270.1), rgb(40, 56, 152).
Aa
White text reads best on this color (9.95:1).
About this color
#283898 is a dark, vivid blue. In OKLCH its lightness is 39%, its chroma 0.157 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Sapphire (#2138AB), ΔE 0.032 away. White text reads best on it, at 9.95:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | vivid (0.157) |
| Temperature | cool |
| Nearest name | Sapphire (#2138AB) |
| Black text | 2.10:1 |
| White text | 9.95:1 |
Values
| HEX | #283898 |
| RGB | rgb(40, 56, 152) |
| HSL | hsl(231, 58%, 38%) |
| OKLCH | oklch(39.2% 0.157 270.1) |
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 #283898 | 9.95:1 | AAA | Lc -96.7 | Preferred for body text |
| Black text on #283898 | 2.10:1 | Fails | Lc 11.4 | Not readable |
| #283898 text on white | 9.95:1 | AAA | Lc 92.5 | Preferred for body text |
| #283898 text on black | 2.10:1 | Fails | Lc -9.9 | 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
#E2E9FF
oklch(93.5% 0.031 271.7)
-
Step 200
200
#CBD8FF
oklch(88.5% 0.056 270.7)
-
Step 300
300
#A9BEFF
oklch(80.9% 0.095 270.4)
-
Step 400
400
#7C99FF
oklch(70.6% 0.153 270.2)
-
Step 500
500
#5D7BFF
oklch(63% 0.198 270.2)
-
Step 600
600
#4359FF
oklch(55.7% 0.244 270.2)
-
Step 700
700
#3542E7
oklch(49.2% 0.243 270.2)
-
Step 800
800
#2B38BB
oklch(42.8% 0.202 270.2)
-
Step 900
900 (this color)
#283898
oklch(39.2% 0.157 270.1)
-
Step 950
950
#151F56
oklch(26.9% 0.1 270.4)
#283898 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) | #00489B | 0.043 |
| Deuteranopia (no green cones) | #003E96 | 0.029 |
| Tritanopia (no blue cones) | #005162 | 0.126 |
| Achromatopsia (no color) | #434343 | 0.157 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #283898
#283898
oklch(39.2% 0.157 270.1)
- #564300
#564300
oklch(39.2% 0.08 90.3)
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 #283898, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sapphire #2138AB ΔE 0.032
- Cobalt #1E488F ΔE 0.044
- Blueberry #464196 ΔE 0.051
- Dark Slate Blue #483D8B ΔE 0.055
- Twilight Blue #0A437A ΔE 0.064
- Indigo Blue #3A18B1 ΔE 0.065
- Light Navy #155084 ΔE 0.076
- Dusk Blue #26538D ΔE 0.077
Use #283898 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.