#374073
Closest named color: Twilight Blue (#0A437A). oklch(39% 0.087 274.1), rgb(55, 64, 115).
Aa
White text reads best on this color (9.79:1).
About this color
#374073 is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.087 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.043 away. White text reads best on it, at 9.79:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.087) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.14:1 |
| White text | 9.79:1 |
Values
| HEX | #374073 |
| RGB | rgb(55, 64, 115) |
| HSL | hsl(231, 35%, 33%) |
| OKLCH | oklch(39% 0.087 274.1) |
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 #374073 | 9.79:1 | AAA | Lc -96.8 | Preferred for body text |
| Black text on #374073 | 2.14:1 | Fails | Lc 11.3 | Not readable |
| #374073 text on white | 9.79:1 | AAA | Lc 92.6 | Preferred for body text |
| #374073 text on black | 2.14:1 | Fails | Lc -9.8 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E6E9F7
oklch(93.6% 0.019 276.3)
-
Step 200
200
#D1D8F2
oklch(88.5% 0.037 273.7)
-
Step 300
300
#B3BEEB
oklch(80.8% 0.065 274.1)
-
Step 400
400
#8C9CE2
oklch(70.8% 0.104 273.6)
-
Step 500
500
#7181D9
oklch(63% 0.133 274.2)
-
Step 600
600
#5B69C7
oklch(55.6% 0.145 274.3)
-
Step 700
700
#4B57AC
oklch(49.1% 0.135 274.3)
-
Step 800
800
#3D488B
oklch(42.8% 0.111 273.8)
-
Step 900
900 (this color)
#374073
oklch(39% 0.087 274.1)
-
Step 950
950
#1E2441
oklch(27% 0.055 273.4)
#374073 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) | #2B4675 | 0.021 |
| Deuteranopia (no green cones) | #264172 | 0.022 |
| Tritanopia (no blue cones) | #1F4B54 | 0.077 |
| Achromatopsia (no color) | #444444 | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #374073
#374073
oklch(39% 0.087 274.1)
- #534400
#534400
oklch(39.1% 0.08 94.6)
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 #374073, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.043
- Dark Slate Blue #483D8B ΔE 0.050
- Cobalt #1E488F ΔE 0.053
- Dark Grey Blue #29465B ΔE 0.053
- Light Navy #155084 ΔE 0.055
- Marine Blue #01386A ΔE 0.063
- Blueberry #464196 ΔE 0.063
- Dusk Blue #26538D ΔE 0.064
Use #374073 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.