#31407F
Closest named color: Cobalt (#1E488F). oklch(39.4% 0.107 270.7), rgb(49, 64, 127).
Aa
White text reads best on this color (9.67:1).
About this color
#31407F is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.107 and its hue 271°. 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 9.67:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.107) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.17:1 |
| White text | 9.67:1 |
Values
| HEX | #31407F |
| RGB | rgb(49, 64, 127) |
| HSL | hsl(228, 44%, 35%) |
| OKLCH | oklch(39.4% 0.107 270.7) |
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 #31407F | 9.67:1 | AAA | Lc -96.4 | Preferred for body text |
| Black text on #31407F | 2.17:1 | Fails | Lc 11.7 | Not readable |
| #31407F text on white | 9.67:1 | AAA | Lc 92.2 | Preferred for body text |
| #31407F text on black | 2.17:1 | Fails | Lc -10.2 | 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
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E4E9FA
oklch(93.5% 0.024 272.8)
-
Step 200
200
#CED8F8
oklch(88.5% 0.045 271.7)
-
Step 300
300
#ADBEF6
oklch(80.8% 0.082 271.4)
-
Step 400
400
#839BF1
oklch(70.7% 0.129 271)
-
Step 500
500
#6580EC
oklch(63.2% 0.164 270.5)
-
Step 600
600
#4E66DA
oklch(55.5% 0.179 270.7)
-
Step 700
700
#3F54BD
oklch(49% 0.166 270.5)
-
Step 800
800
#344599
oklch(42.6% 0.138 270.8)
-
Step 900
900 (this color)
#31407F
oklch(39.4% 0.107 270.7)
-
Step 950
950
#1A2347
oklch(26.9% 0.068 270.7)
#31407F 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) | #214881 | 0.026 |
| Deuteranopia (no green cones) | #14417E | 0.029 |
| Tritanopia (no blue cones) | #004E59 | 0.094 |
| Achromatopsia (no color) | #444444 | 0.108 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31407F
#31407F
oklch(39.4% 0.107 270.7)
- #564400
#564400
oklch(39.4% 0.081 91.6)
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 #31407F, 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 0.036
- Dark Slate Blue #483D8B ΔE 0.041
- Light Navy #155084 ΔE 0.048
- Blueberry #464196 ΔE 0.050
- Dusk Blue #26538D ΔE 0.055
- Deep Sea Blue #015482 ΔE 0.062
- Marine Blue #01386A ΔE 0.064
Use #31407F 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.