#31408E
Closest named color: Cobalt (#1E488F). oklch(40.5% 0.13 271.3), rgb(49, 64, 142).
Aa
White text reads best on this color (9.31:1).
About this color
#31408E is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.130 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.026 away. White text reads best on it, at 9.31:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.130) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.25:1 |
| White text | 9.31:1 |
Values
| HEX | #31408E |
| RGB | rgb(49, 64, 142) |
| HSL | hsl(230, 49%, 37%) |
| OKLCH | oklch(40.5% 0.13 271.3) |
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 #31408E | 9.31:1 | AAA | Lc -95.5 | Preferred for body text |
| Black text on #31408E | 2.25:1 | Fails | Lc 12.8 | Not readable |
| #31408E text on white | 9.31:1 | AAA | Lc 91.2 | Preferred for body text |
| #31408E 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
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E4E9F9
oklch(93.5% 0.022 272.1)
-
Step 200
200
#CFD8F6
oklch(88.5% 0.042 272.3)
-
Step 300
300
#AEBFF3
oklch(81% 0.076 270.6)
-
Step 400
400
#859BEC
oklch(70.6% 0.121 271.5)
-
Step 500
500
#6880E6
oklch(63% 0.155 271.4)
-
Step 600
600
#5167D4
oklch(55.5% 0.169 271.3)
-
Step 700
700
#4255B8
oklch(49% 0.157 271.3)
-
Step 800
800 (this color)
#31408E
oklch(40.5% 0.13 271.3)
-
Step 900
900
#2F3C77
oklch(37.8% 0.101 271.4)
-
Step 950
950
#1B2445
oklch(27.1% 0.063 270.3)
#31408E 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) | #0B4B91 | 0.038 |
| Deuteranopia (no green cones) | #00438C | 0.037 |
| Tritanopia (no blue cones) | #005260 | 0.109 |
| Achromatopsia (no color) | #474747 | 0.130 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31408E
#31408E
oklch(40.5% 0.13 271.3)
- #5A4700
#5A4700
oklch(40.6% 0.083 91.2)
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 #31408E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.026
- Blueberry #464196 ΔE 0.034
- Dark Slate Blue #483D8B ΔE 0.034
- Twilight Blue #0A437A ΔE 0.050
- Dusk Blue #26538D ΔE 0.053
- Light Navy #155084 ΔE 0.053
- Sapphire #2138AB ΔE 0.055
- Deep Sea Blue #015482 ΔE 0.067
Use #31408E 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.