#274999
Closest named color: Cobalt (#1E488F). oklch(42.8% 0.137 264.1), rgb(39, 73, 153).
Aa
White text reads best on this color (8.40:1).
About this color
#274999 is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.137 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.019 away. White text reads best on it, at 8.40:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.137) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.49:1 |
| White text | 8.40:1 |
Values
| HEX | #274999 |
| RGB | rgb(39, 73, 153) |
| HSL | hsl(222, 59%, 38%) |
| OKLCH | oklch(42.8% 0.137 264.1) |
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 #274999 | 8.40:1 | AAA | Lc -93.2 | Preferred for body text |
| Black text on #274999 | 2.49:1 | Fails | Lc 15.4 | Dividers and decoration only |
| #274999 text on white | 8.40:1 | AAA | Lc 88.6 | Fine for body text |
| #274999 text on black | 2.49:1 | 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
#F2F6FD
oklch(97.2% 0.01 261.8)
-
Step 100
100
#E2EAFA
oklch(93.6% 0.023 264.5)
-
Step 200
200
#CADAF7
oklch(88.5% 0.044 262.4)
-
Step 300
300
#A7C1F5
oklch(81% 0.079 264)
-
Step 400
400
#789EF0
oklch(70.6% 0.128 264.5)
-
Step 500
500
#5684EB
oklch(63.1% 0.163 264.2)
-
Step 600
600
#3C6BDA
oklch(55.7% 0.178 264.2)
-
Step 700
700
#2E58BD
oklch(49% 0.166 264.2)
-
Step 800
800 (this color)
#274999
oklch(42.8% 0.137 264.1)
-
Step 900
900
#243E7A
oklch(37.8% 0.107 264.3)
-
Step 950
950
#152547
oklch(27.1% 0.067 263.6)
#274999 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) | #16539C | 0.028 |
| Deuteranopia (no green cones) | #004897 | 0.024 |
| Tritanopia (no blue cones) | #005C6A | 0.108 |
| Achromatopsia (no color) | #4D4D4D | 0.137 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #274999
#274999
oklch(42.8% 0.137 264.1)
- #664A00
#664A00
oklch(42.8% 0.088 83.6)
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 #274999, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.019
- Dusk Blue #26538D ΔE 0.037
- Blueberry #464196 ΔE 0.042
- Light Navy #155084 ΔE 0.044
- Sapphire #2138AB ΔE 0.052
- Dark Slate Blue #483D8B ΔE 0.053
- Deep Sea Blue #015482 ΔE 0.056
- Twilight Blue #0A437A ΔE 0.060
Use #274999 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.