#274D89
Closest named color: Dusk Blue (#26538D). oklch(42.5% 0.109 259.2), rgb(39, 77, 137).
Aa
White text reads best on this color (8.36:1).
About this color
#274D89 is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.109 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.018 away. White text reads best on it, at 8.36:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.109) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.50:1 |
| White text | 8.36:1 |
Values
| HEX | #274D89 |
| RGB | rgb(39, 77, 137) |
| HSL | hsl(217, 56%, 35%) |
| OKLCH | oklch(42.5% 0.109 259.2) |
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 #274D89 | 8.36:1 | AAA | Lc -93.2 | Preferred for body text |
| Black text on #274D89 | 2.50:1 | Fails | Lc 15.4 | Dividers and decoration only |
| #274D89 text on white | 8.36:1 | AAA | Lc 88.6 | Fine for body text |
| #274D89 text on black | 2.50:1 | Fails | Lc -13.6 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EAF7
oklch(93.6% 0.019 263)
-
Step 200
200
#CCDAF1
oklch(88.5% 0.035 260.4)
-
Step 300
300
#A8C2EA
oklch(80.8% 0.064 258.9)
-
Step 400
400
#7AA2E0
oklch(70.8% 0.101 258.9)
-
Step 500
500
#5889D7
oklch(63.1% 0.13 259.3)
-
Step 600
600
#3D71C5
oklch(55.5% 0.142 259.6)
-
Step 700
700
#2F5FAA
oklch(49.2% 0.131 259.1)
-
Step 800
800 (this color)
#274D89
oklch(42.5% 0.109 259.2)
-
Step 900
900
#25416E
oklch(37.7% 0.085 259.5)
-
Step 950
950
#162640
oklch(26.9% 0.053 259.7)
#274D89 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) | #30538B | 0.021 |
| Deuteranopia (no green cones) | #204988 | 0.014 |
| Tritanopia (no blue cones) | #005B64 | 0.087 |
| Achromatopsia (no color) | #4E4E4E | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #274D89
#274D89
oklch(42.5% 0.109 259.2)
- #684800
#684800
oklch(42.6% 0.088 79.5)
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 #274D89, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.018
- Light Navy #155084 ΔE 0.018
- Cobalt #1E488F ΔE 0.021
- Deep Sea Blue #015482 ΔE 0.031
- Light Navy Blue #2E5A88 ΔE 0.041
- Twilight Blue #0A437A ΔE 0.046
- Denim Blue #3B5B92 ΔE 0.050
- Twilight #4E518B ΔE 0.052
Use #274D89 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.