#374E98
Closest named color: Dusk Blue (#26538D). oklch(44.6% 0.124 268.1), rgb(55, 78, 152).
Aa
White text reads best on this color (7.76:1).
About this color
#374E98 is a dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.124 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.030 away. White text reads best on it, at 7.76:1.
| Hue family | Blues |
| Lightness | dark (45%) |
| Chroma | moderately saturated (0.124) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.70:1 |
| White text | 7.76:1 |
Values
| HEX | #374E98 |
| RGB | rgb(55, 78, 152) |
| HSL | hsl(226, 47%, 41%) |
| OKLCH | oklch(44.6% 0.124 268.1) |
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 #374E98 | 7.76:1 | AAA | Lc -91.5 | Preferred for body text |
| Black text on #374E98 | 2.70:1 | Fails | Lc 17.3 | Dividers and decoration only |
| #374E98 text on white | 7.76:1 | AAA | Lc 86.7 | Fine for body text |
| #374E98 text on black | 2.70:1 | Fails | Lc -15.4 | Dividers and decoration only |
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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E4EAF8
oklch(93.7% 0.02 267.3)
-
Step 200
200
#CED9F5
oklch(88.6% 0.04 268.5)
-
Step 300
300
#ADC0F0
oklch(81% 0.071 267.9)
-
Step 400
400
#829DE9
oklch(70.6% 0.116 268.4)
-
Step 500
500
#6383E2
oklch(63% 0.148 268)
-
Step 600
600
#4B6AD0
oklch(55.5% 0.161 268.1)
-
Step 700
700
#3D58B4
oklch(49% 0.149 268.2)
-
Step 800
800 (this color)
#374E98
oklch(44.6% 0.124 268.1)
-
Step 900
900
#2C3D74
oklch(37.6% 0.096 268.5)
-
Step 950
950
#1A2444
oklch(26.9% 0.061 268.9)
#374E98 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) | #28579B | 0.027 |
| Deuteranopia (no green cones) | #164E96 | 0.030 |
| Tritanopia (no blue cones) | #005F6B | 0.106 |
| Achromatopsia (no color) | #525252 | 0.124 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #374E98
#374E98
oklch(44.6% 0.124 268.1)
- #695000
#695000
oklch(44.5% 0.091 87.8)
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 #374E98, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.030
- Cobalt #1E488F ΔE 0.036
- Blueberry #464196 ΔE 0.037
- Twilight #4E518B ΔE 0.040
- Denim Blue #3B5B92 ΔE 0.041
- Light Navy #155084 ΔE 0.047
- Light Navy Blue #2E5A88 ΔE 0.048
- Dark Slate Blue #483D8B ΔE 0.050
Use #374E98 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.