#274379
Closest named color: Twilight Blue (#0A437A). oklch(39% 0.098 262.2), rgb(39, 67, 121).
Aa
White text reads best on this color (9.69:1).
About this color
#274379 is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.098 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.022 away. White text reads best on it, at 9.69:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.098) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.16:1 |
| White text | 9.69:1 |
Values
| HEX | #274379 |
| RGB | rgb(39, 67, 121) |
| HSL | hsl(220, 51%, 31%) |
| OKLCH | oklch(39% 0.098 262.2) |
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 #274379 | 9.69:1 | AAA | Lc -96.5 | Preferred for body text |
| Black text on #274379 | 2.16:1 | Fails | Lc 11.7 | Not readable |
| #274379 text on white | 9.69:1 | AAA | Lc 92.2 | Preferred for body text |
| #274379 text on black | 2.16:1 | Fails | Lc -10.2 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EAF9
oklch(93.5% 0.022 263.2)
-
Step 200
200
#CBDAF5
oklch(88.6% 0.041 262.3)
-
Step 300
300
#A7C1F1
oklch(80.8% 0.074 262.5)
-
Step 400
400
#78A0EA
oklch(70.7% 0.118 262.1)
-
Step 500
500
#5686E3
oklch(63% 0.15 262.3)
-
Step 600
600
#3B6ED1
oklch(55.6% 0.163 262)
-
Step 700
700
#2E5BB5
oklch(49% 0.151 262.3)
-
Step 800
800
#274B93
oklch(42.7% 0.126 262.4)
-
Step 900
900 (this color)
#274379
oklch(39% 0.098 262.2)
-
Step 950
950
#152544
oklch(26.8% 0.062 262.4)
#274379 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) | #2A487B | 0.016 |
| Deuteranopia (no green cones) | #1D4178 | 0.013 |
| Tritanopia (no blue cones) | #004F58 | 0.080 |
| Achromatopsia (no color) | #444444 | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #274379
#274379
oklch(39% 0.098 262.2)
- #5A4000
#5A4000
oklch(39% 0.08 82.4)
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 #274379, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.022
- Cobalt #1E488F ΔE 0.038
- Light Navy #155084 ΔE 0.039
- Deep Sea Blue #015482 ΔE 0.051
- Dusk Blue #26538D ΔE 0.053
- Marine Blue #01386A ΔE 0.054
- Dark Grey Blue #29465B ΔE 0.055
- Dark Slate Blue #483D8B ΔE 0.058
Use #274379 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.