#256BB9
Closest named color: Mid Blue (#276AB3). oklch(52.6% 0.141 254.1), rgb(37, 107, 185).
Aa
White text reads best on this color (5.40:1).
About this color
#256BB9 is a medium-dark, vivid blue. In OKLCH its lightness is 53%, its chroma 0.141 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.009 away. White text reads best on it, at 5.40:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.141) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.88:1 |
| White text | 5.40:1 |
Values
| HEX | #256BB9 |
| RGB | rgb(37, 107, 185) |
| HSL | hsl(212, 67%, 44%) |
| OKLCH | oklch(52.6% 0.141 254.1) |
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 #256BB9 | 5.40:1 | AA | Lc -81.9 | Fine for body text |
| Black text on #256BB9 | 3.88:1 | AA large text | Lc 27.5 | Dividers and decoration only |
| #256BB9 text on white | 5.40:1 | AA | Lc 76.5 | Fine for body text |
| #256BB9 text on black | 3.88:1 | AA large text | Lc -25.2 | 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 600.
-
Step 50
50
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E2EBF6
oklch(93.7% 0.018 253.3)
-
Step 200
200
#CADBF1
oklch(88.6% 0.035 254.9)
-
Step 300
300
#A5C3E9
oklch(80.8% 0.063 254.5)
-
Step 400
400
#74A4DF
oklch(70.8% 0.101 254.1)
-
Step 500
500
#4E8CD6
oklch(63.2% 0.129 254.1)
-
Step 600
600 (this color)
#256BB9
oklch(52.6% 0.141 254.1)
-
Step 700
700
#2161A8
oklch(49% 0.13 253.9)
-
Step 800
800
#1E5088
oklch(42.8% 0.107 253.7)
-
Step 900
900
#1E436D
oklch(37.8% 0.084 253.4)
-
Step 950
950
#132740
oklch(27% 0.054 254.9)
#256BB9 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) | #4471BC | 0.033 |
| Deuteranopia (no green cones) | #2A64B7 | 0.019 |
| Tritanopia (no blue cones) | #007E89 | 0.107 |
| Achromatopsia (no color) | #6A6A6A | 0.141 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #256BB9
#256BB9
oklch(52.6% 0.141 254.1)
- #905F00
#905F00
oklch(52.6% 0.111 74.1)
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 #256BB9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.009
- French Blue #436BAD ΔE 0.030
- Windows Blue #3778BF ΔE 0.041
- Flat Blue #3C73A8 ΔE 0.043
- Nice Blue #107AB0 ΔE 0.047
- Muted Blue #3B719F ΔE 0.051
- Ocean Blue #03719C ΔE 0.055
- Peacock Blue #016795 ΔE 0.061
Use #256BB9 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.