#274C8D
Closest named color: Cobalt (#1E488F). oklch(42.5% 0.116 260.8), rgb(39, 76, 141).
Aa
White text reads best on this color (8.38:1).
About this color
#274C8D is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.116 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.016 away. White text reads best on it, at 8.38:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.116) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.50:1 |
| White text | 8.38:1 |
Values
| HEX | #274C8D |
| RGB | rgb(39, 76, 141) |
| HSL | hsl(218, 57%, 35%) |
| OKLCH | oklch(42.5% 0.116 260.8) |
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 #274C8D | 8.38:1 | AAA | Lc -93.2 | Preferred for body text |
| Black text on #274C8D | 2.50:1 | Fails | Lc 15.4 | Dividers and decoration only |
| #274C8D text on white | 8.38:1 | AAA | Lc 88.6 | Fine for body text |
| #274C8D 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E3EAF7
oklch(93.6% 0.019 263)
-
Step 200
200
#CBDAF3
oklch(88.5% 0.038 260.7)
-
Step 300
300
#A8C2ED
oklch(80.9% 0.067 260.4)
-
Step 400
400
#79A1E4
oklch(70.7% 0.108 260.4)
-
Step 500
500
#5788DC
oklch(63.1% 0.138 260.5)
-
Step 600
600
#3D70CA
oklch(55.6% 0.15 260.8)
-
Step 700
700
#2F5DAF
oklch(49.1% 0.14 260.9)
-
Step 800
800 (this color)
#274C8D
oklch(42.5% 0.116 260.8)
-
Step 900
900
#244071
oklch(37.6% 0.091 260.8)
-
Step 950
950
#162642
oklch(27% 0.057 260.9)
#274C8D 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) | #2B538F | 0.021 |
| Deuteranopia (no green cones) | #18498C | 0.017 |
| Tritanopia (no blue cones) | #005B65 | 0.093 |
| Achromatopsia (no color) | #4E4E4E | 0.116 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #274C8D
#274C8D
oklch(42.5% 0.116 260.8)
- #674800
#674800
oklch(42.5% 0.088 80.4)
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 #274C8D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.016
- Dusk Blue #26538D ΔE 0.020
- Light Navy #155084 ΔE 0.024
- Deep Sea Blue #015482 ΔE 0.037
- Light Navy Blue #2E5A88 ΔE 0.045
- Twilight Blue #0A437A ΔE 0.048
- Blueberry #464196 ΔE 0.049
- Denim Blue #3B5B92 ΔE 0.052
Use #274C8D 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.