#283972
Closest named color: Twilight Blue (#0A437A). oklch(36.3% 0.1 268.5), rgb(40, 57, 114).
Aa
White text reads best on this color (10.94:1).
About this color
#283972 is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.100 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.035 away. White text reads best on it, at 10.94:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.100) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.91:1 |
| White text | 10.94:1 |
Values
| HEX | #283972 |
| RGB | rgb(40, 57, 114) |
| HSL | hsl(226, 48%, 30%) |
| OKLCH | oklch(36.3% 0.1 268.5) |
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 #283972 | 10.94:1 | AAA | Lc -99.0 | Preferred for body text |
| Black text on #283972 | 1.91:1 | Fails | Lc 8.8 | Not readable |
| #283972 text on white | 10.94:1 | AAA | Lc 95.1 | Preferred for body text |
| #283972 text on black | 1.91:1 | Fails | Lc -7.5 | 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
#F2F5FC
oklch(97% 0.01 267.4)
-
Step 100
100
#E4EAF9
oklch(93.7% 0.021 268.4)
-
Step 200
200
#CDD9F6
oklch(88.5% 0.042 267.7)
-
Step 300
300
#ACBFF2
oklch(80.8% 0.075 268.8)
-
Step 400
400
#819DEC
oklch(70.7% 0.12 268.4)
-
Step 500
500
#6382E6
oklch(63.1% 0.154 268.7)
-
Step 600
600
#4B69D4
oklch(55.5% 0.168 268.6)
-
Step 700
700
#3D57B8
oklch(49.1% 0.156 268.7)
-
Step 800
800
#324895
oklch(42.8% 0.129 268.5)
-
Step 900
900 (this color)
#283972
oklch(36.3% 0.1 268.5)
-
Step 950
950
#192445
oklch(26.9% 0.063 268.1)
#283972 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) | #1C4074 | 0.022 |
| Deuteranopia (no green cones) | #0F3971 | 0.025 |
| Tritanopia (no blue cones) | #004650 | 0.085 |
| Achromatopsia (no color) | #3D3D3D | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #283972
#283972
oklch(36.3% 0.1 268.5)
- #4E3B00
#4E3B00
oklch(36.3% 0.074 88.2)
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 #283972, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.035
- Marine Blue #01386A ΔE 0.037
- Prussian Blue #1D3557 ΔE 0.050
- Marine #042E60 ΔE 0.060
- Cobalt #1E488F ΔE 0.060
- Dark Grey Blue #29465B ΔE 0.063
- Dark Slate Blue #483D8B ΔE 0.066
- Light Navy #155084 ΔE 0.069
Use #283972 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.