#31477F
Closest named color: Cobalt (#1E488F). oklch(40.9% 0.098 266.1), rgb(49, 71, 127).
Aa
White text reads best on this color (8.98:1).
About this color
#31477F is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.098 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.031 away. White text reads best on it, at 8.98:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.098) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.33:1 |
| White text | 8.98:1 |
Values
| HEX | #31477F |
| RGB | rgb(49, 71, 127) |
| HSL | hsl(223, 44%, 35%) |
| OKLCH | oklch(40.9% 0.098 266.1) |
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 #31477F | 8.98:1 | AAA | Lc -94.9 | Preferred for body text |
| Black text on #31477F | 2.33:1 | Fails | Lc 13.5 | Not readable |
| #31477F text on white | 8.98:1 | AAA | Lc 90.4 | Preferred for body text |
| #31477F text on black | 2.33:1 | Fails | Lc -11.9 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5EAF5
oklch(93.6% 0.016 266.3)
-
Step 200
200
#CFD9EF
oklch(88.4% 0.032 266.1)
-
Step 300
300
#AFC0E7
oklch(80.8% 0.058 266.6)
-
Step 400
400
#869FDA
oklch(70.6% 0.091 266.4)
-
Step 500
500
#6887D0
oklch(63.2% 0.116 265.7)
-
Step 600
600
#506FBD
oklch(55.5% 0.127 266.1)
-
Step 700
700
#415DA3
oklch(49.2% 0.117 265.8)
-
Step 800
800 (this color)
#31477F
oklch(40.9% 0.098 266.1)
-
Step 900
900
#2E406A
oklch(37.7% 0.076 265.4)
-
Step 950
950
#1B263E
oklch(27.1% 0.048 264.7)
#31477F 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) | #2E4D81 | 0.017 |
| Deuteranopia (no green cones) | #23467E | 0.016 |
| Tritanopia (no blue cones) | #00535C | 0.086 |
| Achromatopsia (no color) | #494949 | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31477F
#31477F
oklch(40.9% 0.098 266.1)
- #5E4600
#5E4600
oklch(40.9% 0.084 86.2)
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 #31477F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.031
- Light Navy #155084 ΔE 0.032
- Dusk Blue #26538D ΔE 0.038
- Twilight Blue #0A437A ΔE 0.039
- Deep Sea Blue #015482 ΔE 0.045
- Dark Slate Blue #483D8B ΔE 0.047
- Blueberry #464196 ΔE 0.052
- Light Navy Blue #2E5A88 ΔE 0.055
Use #31477F 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.