#274A63
Closest named color: Dark Grey Blue (#29465B). oklch(39.4% 0.059 241.5), rgb(39, 74, 99).
Aa
White text reads best on this color (9.35:1).
About this color
#274A63 is a dark, muted blue. In OKLCH its lightness is 39%, its chroma 0.059 and its hue 241°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.016 away. White text reads best on it, at 9.35:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | muted (0.059) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.24:1 |
| White text | 9.35:1 |
Values
| HEX | #274A63 |
| RGB | rgb(39, 74, 99) |
| HSL | hsl(205, 43%, 27%) |
| OKLCH | oklch(39.4% 0.059 241.5) |
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 #274A63 | 9.35:1 | AAA | Lc -95.8 | Preferred for body text |
| Black text on #274A63 | 2.24:1 | Fails | Lc 12.5 | Not readable |
| #274A63 text on white | 9.35:1 | AAA | Lc 91.5 | Preferred for body text |
| #274A63 text on black | 2.24:1 | Fails | Lc -10.9 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E3EBF2
oklch(93.6% 0.013 244.3)
-
Step 200
200
#CCDCE8
oklch(88.6% 0.024 240.1)
-
Step 300
300
#A8C5DB
oklch(80.9% 0.044 240.9)
-
Step 400
400
#79A7C9
oklch(70.8% 0.07 241)
-
Step 500
500
#5490BB
oklch(63% 0.09 241.3)
-
Step 600
600
#377AA7
oklch(55.6% 0.097 241)
-
Step 700
700
#296690
oklch(49% 0.092 242.2)
-
Step 800
800
#235475
oklch(42.8% 0.076 241.2)
-
Step 900
900 (this color)
#274A63
oklch(39.4% 0.059 241.5)
-
Step 950
950
#152937
oklch(27.1% 0.037 240.5)
#274A63 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) | #3F4A64 | 0.031 |
| Deuteranopia (no green cones) | #374463 | 0.025 |
| Tritanopia (no blue cones) | #005052 | 0.047 |
| Achromatopsia (no color) | #474747 | 0.059 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #274A63
#274A63
oklch(39.4% 0.059 241.5)
- #5D3F24
#5D3F24
oklch(39.5% 0.058 61.8)
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 #274A63, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.016
- Charcoal #264653 ΔE 0.028
- Dark Slate Gray #2F4F4F ΔE 0.043
- Deep Teal #00555A ΔE 0.047
- Dark Teal #014D4E ΔE 0.049
- Twilight Blue #0A437A ΔE 0.054
- Deep Sea Blue #015482 ΔE 0.055
- Light Navy #155084 ΔE 0.055
Use #274A63 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.