#274D8D
Closest named color: Dusk Blue (#26538D). oklch(42.8% 0.115 260.2), rgb(39, 77, 141).
Aa
White text reads best on this color (8.29:1).
About this color
#274D8D is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.115 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.017 away. White text reads best on it, at 8.29:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.115) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.53:1 |
| White text | 8.29:1 |
Values
| HEX | #274D8D |
| RGB | rgb(39, 77, 141) |
| HSL | hsl(218, 57%, 35%) |
| OKLCH | oklch(42.8% 0.115 260.2) |
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 #274D8D | 8.29:1 | AAA | Lc -93.0 | Preferred for body text |
| Black text on #274D8D | 2.53:1 | Fails | Lc 15.7 | Dividers and decoration only |
| #274D8D text on white | 8.29:1 | AAA | Lc 88.3 | Fine for body text |
| #274D8D text on black | 2.53:1 | Fails | Lc -13.8 | 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 800.
-
Step 50
50
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EAF7
oklch(93.5% 0.02 260.2)
-
Step 200
200
#CBDAF2
oklch(88.5% 0.037 259.8)
-
Step 300
300
#A8C2ED
oklch(80.9% 0.067 260.4)
-
Step 400
400
#79A1E3
oklch(70.6% 0.107 260.1)
-
Step 500
500
#5788DC
oklch(63.1% 0.138 260.5)
-
Step 600
600
#3C70C9
oklch(55.5% 0.149 260.4)
-
Step 700
700
#2E5EAE
oklch(49.2% 0.138 260)
-
Step 800
800 (this color)
#274D8D
oklch(42.8% 0.115 260.2)
-
Step 900
900
#244170
oklch(37.8% 0.088 259.6)
-
Step 950
950
#152642
oklch(27% 0.057 259.9)
#274D8D 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) | #2D538F | 0.019 |
| Deuteranopia (no green cones) | #1A4A8C | 0.015 |
| Tritanopia (no blue cones) | #005C66 | 0.091 |
| Achromatopsia (no color) | #4E4E4E | 0.115 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #274D8D
#274D8D
oklch(42.8% 0.115 260.2)
- #684900
#684900
oklch(42.8% 0.089 80.7)
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 #274D8D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.017
- Cobalt #1E488F ΔE 0.018
- Light Navy #155084 ΔE 0.023
- Deep Sea Blue #015482 ΔE 0.035
- Light Navy Blue #2E5A88 ΔE 0.043
- Denim Blue #3B5B92 ΔE 0.049
- Twilight Blue #0A437A ΔE 0.049
- Blueberry #464196 ΔE 0.051
Use #274D8D 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.