#313E92
Closest named color: Cobalt (#1E488F). oklch(40.4% 0.138 272.1), rgb(49, 62, 146).
Aa
White text reads best on this color (9.39:1).
About this color
#313E92 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.138 and its hue 272°. 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 9.39:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.138) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.23:1 |
| White text | 9.39:1 |
Values
| HEX | #313E92 |
| RGB | rgb(49, 62, 146) |
| HSL | hsl(232, 50%, 38%) |
| OKLCH | oklch(40.4% 0.138 272.1) |
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 #313E92 | 9.39:1 | AAA | Lc -95.7 | Preferred for body text |
| Black text on #313E92 | 2.23:1 | Fails | Lc 12.6 | Not readable |
| #313E92 text on white | 9.39:1 | AAA | Lc 91.3 | Preferred for body text |
| #313E92 text on black | 2.23:1 | Fails | Lc -11.0 | 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
#E4E9FA
oklch(93.5% 0.024 272.8)
-
Step 200
200
#CED8F8
oklch(88.5% 0.045 271.7)
-
Step 300
300
#AEBEF6
oklch(80.9% 0.081 272.1)
-
Step 400
400
#859AF1
oklch(70.6% 0.13 272.4)
-
Step 500
500
#687FEC
oklch(63.1% 0.165 272)
-
Step 600
600
#5165DA
oklch(55.5% 0.179 272)
-
Step 700
700
#4253BE
oklch(49.1% 0.168 271.9)
-
Step 800
800 (this color)
#313E92
oklch(40.4% 0.138 272.1)
-
Step 900
900
#2F3B7A
oklch(37.8% 0.107 272.2)
-
Step 950
950
#1B2347
oklch(27% 0.068 271.8)
#313E92 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) | #004B95 | 0.044 |
| Deuteranopia (no green cones) | #004290 | 0.037 |
| Tritanopia (no blue cones) | #005261 | 0.116 |
| Achromatopsia (no color) | #464646 | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #313E92
#313E92
oklch(40.4% 0.138 272.1)
- #594700
#594700
oklch(40.5% 0.083 92.2)
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 #313E92, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.031
- Blueberry #464196 ΔE 0.034
- Dark Slate Blue #483D8B ΔE 0.036
- Sapphire #2138AB ΔE 0.048
- Twilight Blue #0A437A ΔE 0.056
- Dusk Blue #26538D ΔE 0.059
- Light Navy #155084 ΔE 0.060
- Twilight #4E518B ΔE 0.073
Use #313E92 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.