#31417E
Closest named color: Cobalt (#1E488F). oklch(39.5% 0.105 270), rgb(49, 65, 126).
Aa
White text reads best on this color (9.59:1).
About this color
#31417E is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.105 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.035 away. White text reads best on it, at 9.59:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.105) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.18:1 |
| White text | 9.59:1 |
Values
| HEX | #31417E |
| RGB | rgb(49, 65, 126) |
| HSL | hsl(228, 44%, 34%) |
| OKLCH | oklch(39.5% 0.105 270) |
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 #31417E | 9.59:1 | AAA | Lc -96.3 | Preferred for body text |
| Black text on #31417E | 2.18:1 | Fails | Lc 11.9 | Not readable |
| #31417E text on white | 9.59:1 | AAA | Lc 92.0 | Preferred for body text |
| #31417E text on black | 2.18:1 | Fails | Lc -10.4 | 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
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E4EAFA
oklch(93.7% 0.023 269.4)
-
Step 200
200
#CED8F7
oklch(88.4% 0.044 271.3)
-
Step 300
300
#ADBFF4
oklch(81% 0.078 270)
-
Step 400
400
#829CEF
oklch(70.7% 0.125 269.8)
-
Step 500
500
#6481E9
oklch(63.1% 0.159 269.7)
-
Step 600
600
#4D67D8
oklch(55.5% 0.175 270.1)
-
Step 700
700
#3F55BB
oklch(49.1% 0.162 270.2)
-
Step 800
800
#344697
oklch(42.6% 0.134 270.3)
-
Step 900
900 (this color)
#31417E
oklch(39.5% 0.105 270)
-
Step 950
950
#1A2447
oklch(27.1% 0.066 269.6)
#31417E 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) | #244980 | 0.025 |
| Deuteranopia (no green cones) | #18427D | 0.026 |
| Tritanopia (no blue cones) | #004F59 | 0.093 |
| Achromatopsia (no color) | #454545 | 0.105 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31417E
#31417E
oklch(39.5% 0.105 270)
- #574400
#574400
oklch(39.6% 0.081 90.6)
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 #31417E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.035
- Twilight Blue #0A437A ΔE 0.035
- Dark Slate Blue #483D8B ΔE 0.042
- Light Navy #155084 ΔE 0.046
- Blueberry #464196 ΔE 0.051
- Dusk Blue #26538D ΔE 0.053
- Deep Sea Blue #015482 ΔE 0.059
- Marine Blue #01386A ΔE 0.064
Use #31417E 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.