#256AA4
Closest named color: Mid Blue (#276AB3). oklch(51% 0.115 247.9), rgb(37, 106, 164).
Aa
White text reads best on this color (5.71:1).
About this color
#256AA4 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 51%, its chroma 0.115 and its hue 248°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.024 away. White text reads best on it, at 5.71:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.115) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.67:1 |
| White text | 5.71:1 |
Values
| HEX | #256AA4 |
| RGB | rgb(37, 106, 164) |
| HSL | hsl(207, 63%, 39%) |
| OKLCH | oklch(51% 0.115 247.9) |
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 #256AA4 | 5.71:1 | AA | Lc -83.5 | Fine for body text |
| Black text on #256AA4 | 3.67:1 | AA large text | Lc 25.8 | Dividers and decoration only |
| #256AA4 text on white | 5.71:1 | AA | Lc 78.2 | Fine for body text |
| #256AA4 text on black | 3.67:1 | AA large text | Lc -23.6 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF4
oklch(93.6% 0.016 248)
-
Step 200
200
#CADBED
oklch(88.4% 0.031 249.7)
-
Step 300
300
#A5C4E3
oklch(80.8% 0.055 248.5)
-
Step 400
400
#73A6D5
oklch(70.7% 0.088 247.2)
-
Step 500
500
#4C8FCA
oklch(63.2% 0.113 247.2)
-
Step 600
600
#2C78B7
oklch(55.7% 0.123 247.5)
-
Step 700
700 (this color)
#256AA4
oklch(51% 0.115 247.9)
-
Step 800
800
#1C5280
oklch(42.7% 0.095 248.1)
-
Step 900
900
#1D4467
oklch(37.6% 0.075 248.2)
-
Step 950
950
#12283C
oklch(26.9% 0.047 247.8)
#256AA4 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) | #4F6DA6 | 0.042 |
| Deuteranopia (no green cones) | #3D61A3 | 0.030 |
| Tritanopia (no blue cones) | #00787F | 0.084 |
| Achromatopsia (no color) | #666666 | 0.115 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #256AA4
#256AA4
oklch(51% 0.115 247.9)
- #8F5800
#8F5800
oklch(51% 0.112 68.5)
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 #256AA4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.024
- Ocean Blue #03719C ΔE 0.029
- Peacock Blue #016795 ΔE 0.031
- French Blue #436BAD ΔE 0.031
- Muted Blue #3B719F ΔE 0.031
- Flat Blue #3C73A8 ΔE 0.035
- Denim #3B638C ΔE 0.041
- Dusky Blue #475F94 ΔE 0.043
Use #256AA4 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.