#373984
Closest named color: Dark Slate Blue (#483D8B). oklch(38.7% 0.123 277.8), rgb(55, 57, 132).
Aa
White text reads best on this color (10.09:1).
About this color
#373984 is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.123 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.033 away. White text reads best on it, at 10.09:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.123) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.08:1 |
| White text | 10.09:1 |
Values
| HEX | #373984 |
| RGB | rgb(55, 57, 132) |
| HSL | hsl(238, 41%, 37%) |
| OKLCH | oklch(38.7% 0.123 277.8) |
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 #373984 | 10.09:1 | AAA | Lc -97.3 | Preferred for body text |
| Black text on #373984 | 2.08:1 | Fails | Lc 10.8 | Not readable |
| #373984 text on white | 10.09:1 | AAA | Lc 93.1 | Preferred for body text |
| #373984 text on black | 2.08:1 | Fails | Lc -9.3 | 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
#F3F5FE
oklch(97.1% 0.012 276.1)
-
Step 100
100
#E5E9FC
oklch(93.7% 0.026 276.4)
-
Step 200
200
#D0D7FC
oklch(88.6% 0.052 276.9)
-
Step 300
300
#B2BBFC
oklch(80.8% 0.092 278)
-
Step 400
400
#8C95FB
oklch(70.7% 0.148 278.1)
-
Step 500
500
#7277F8
oklch(63.1% 0.189 277.8)
-
Step 600
600
#5D5CE7
oklch(55.7% 0.205 277.7)
-
Step 700
700
#4D4AC9
oklch(49.1% 0.191 277.7)
-
Step 800
800
#3F3EA2
oklch(42.7% 0.157 277.9)
-
Step 900
900 (this color)
#373984
oklch(38.7% 0.123 277.8)
-
Step 950
950
#1E204B
oklch(26.8% 0.078 277.7)
#373984 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) | #054587 | 0.050 |
| Deuteranopia (no green cones) | #003F82 | 0.049 |
| Tritanopia (no blue cones) | #0C4A58 | 0.107 |
| Achromatopsia (no color) | #424242 | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #373984
#373984
oklch(38.7% 0.123 277.8)
- #504400
#504400
oklch(38.7% 0.08 97.7)
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 #373984, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.033
- Blueberry #464196 ΔE 0.044
- Cobalt #1E488F ΔE 0.047
- Twilight Blue #0A437A ΔE 0.053
- Light Navy #155084 ΔE 0.068
- Sapphire #2138AB ΔE 0.069
- Dusk Blue #26538D ΔE 0.071
- Marine Blue #01386A ΔE 0.072
Use #373984 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.