#1A3984
Closest named color: Twilight Blue (#0A437A). oklch(37% 0.132 264), rgb(26, 57, 132).
Aa
White text reads best on this color (10.70:1).
About this color
#1A3984 is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.132 and its hue 264°. 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 10.70:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.132) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.96:1 |
| White text | 10.70:1 |
Values
| HEX | #1A3984 |
| RGB | rgb(26, 57, 132) |
| HSL | hsl(222, 67%, 31%) |
| OKLCH | oklch(37% 0.132 264) |
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 #1A3984 | 10.70:1 | AAA | Lc -98.3 | Preferred for body text |
| Black text on #1A3984 | 1.96:1 | Fails | Lc 9.6 | Not readable |
| #1A3984 text on white | 10.70:1 | AAA | Lc 94.3 | Preferred for body text |
| #1A3984 text on black | 1.96:1 | Fails | Lc -8.2 | 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 900.
-
Step 50
50
#F1F6FF
oklch(97.2% 0.013 262.4)
-
Step 100
100
#E0EAFE
oklch(93.6% 0.029 264.4)
-
Step 200
200
#C7DAFE
oklch(88.6% 0.054 263.2)
-
Step 300
300
#A1C0FF
oklch(80.8% 0.096 264.1)
-
Step 400
400
#6F9DFF
oklch(70.7% 0.152 263.9)
-
Step 500
500
#4A80FF
oklch(63.1% 0.198 264.2)
-
Step 600
600
#2D64F1
oklch(55.5% 0.22 264.2)
-
Step 700
700
#2152D2
oklch(49.1% 0.204 264.1)
-
Step 800
800
#1C44AA
oklch(42.7% 0.17 264.1)
-
Step 900
900 (this color)
#1A3984
oklch(37% 0.132 264)
-
Step 950
950
#11234F
oklch(27% 0.084 264.6)
#1A3984 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) | #004387 | 0.028 |
| Deuteranopia (no green cones) | #003983 | 0.016 |
| Tritanopia (no blue cones) | #004C58 | 0.105 |
| Achromatopsia (no color) | #3E3E3E | 0.132 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1A3984
#1A3984
oklch(37% 0.132 264)
- #533C00
#533C00
oklch(37.2% 0.076 84.2)
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 #1A3984, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.035
- Cobalt #1E488F ΔE 0.045
- Marine Blue #01386A ΔE 0.049
- Sapphire #2138AB ΔE 0.065
- Light Navy #155084 ΔE 0.066
- Dark Slate Blue #483D8B ΔE 0.066
- Blueberry #464196 ΔE 0.071
- Marine #042E60 ΔE 0.073
Use #1A3984 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.