#275DAB
Closest named color: Mid Blue (#276AB3). oklch(48.5% 0.137 258.1), rgb(39, 93, 171).
Aa
White text reads best on this color (6.48:1).
About this color
#275DAB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 49%, its chroma 0.137 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.037 away. White text reads best on it, at 6.48:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.137) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.24:1 |
| White text | 6.48:1 |
Values
| HEX | #275DAB |
| RGB | rgb(39, 93, 171) |
| HSL | hsl(215, 63%, 41%) |
| OKLCH | oklch(48.5% 0.137 258.1) |
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 #275DAB | 6.48:1 | AA | Lc -86.9 | Fine for body text |
| Black text on #275DAB | 3.24:1 | AA large text | Lc 22.3 | Dividers and decoration only |
| #275DAB text on white | 6.48:1 | AA | Lc 81.8 | Fine for body text |
| #275DAB text on black | 3.24:1 | AA large text | Lc -20.1 | Dividers and decoration only |
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 700.
-
Step 50
50
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EBF7
oklch(93.7% 0.019 255.5)
-
Step 200
200
#CADAF2
oklch(88.4% 0.037 258.4)
-
Step 300
300
#A6C2EC
oklch(80.8% 0.067 258.4)
-
Step 400
400
#77A2E3
oklch(70.7% 0.107 258.4)
-
Step 500
500
#5389DA
oklch(63% 0.136 258.3)
-
Step 600
600
#3672C8
oklch(55.7% 0.147 257.8)
-
Step 700
700 (this color)
#275DAB
oklch(48.5% 0.137 258.1)
-
Step 800
800
#234E8C
oklch(42.8% 0.113 257.9)
-
Step 900
900
#224170
oklch(37.7% 0.089 258.5)
-
Step 950
950
#142641
oklch(26.8% 0.056 258.3)
#275DAB 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) | #3465AE | 0.027 |
| Deuteranopia (no green cones) | #1758A9 | 0.019 |
| Tritanopia (no blue cones) | #006F7B | 0.106 |
| Achromatopsia (no color) | #5E5E5E | 0.137 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #275DAB
#275DAB
oklch(48.5% 0.137 258.1)
- #7E5600
#7E5600
oklch(48.4% 0.101 77.5)
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 #275DAB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.037
- Denim Blue #3B5B92 ΔE 0.042
- Dusky Blue #475F94 ΔE 0.049
- French Blue #436BAD ΔE 0.051
- Peacock Blue #016795 ΔE 0.052
- Dusk Blue #26538D ΔE 0.053
- Light Navy Blue #2E5A88 ΔE 0.056
- Denim #3B638C ΔE 0.059
Use #275DAB 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.