#256397
Closest named color: Peacock Blue (#016795). oklch(48.6% 0.105 247.5), rgb(37, 99, 151).
Aa
White text reads best on this color (6.34:1).
About this color
#256397 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 49%, its chroma 0.105 and its hue 248°. Its hue sits on the cool side of the wheel. The nearest named color is Peacock Blue (#016795), ΔE 0.018 away. White text reads best on it, at 6.34:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.105) |
| Temperature | cool |
| Nearest name | Peacock Blue (#016795) |
| Black text | 3.31:1 |
| White text | 6.34:1 |
Values
| HEX | #256397 |
| RGB | rgb(37, 99, 151) |
| HSL | hsl(207, 61%, 37%) |
| OKLCH | oklch(48.6% 0.105 247.5) |
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 #256397 | 6.34:1 | AA | Lc -86.4 | Fine for body text |
| Black text on #256397 | 3.31:1 | AA large text | Lc 22.8 | Dividers and decoration only |
| #256397 text on white | 6.34:1 | AA | Lc 81.2 | Fine for body text |
| #256397 text on black | 3.31:1 | AA large text | Lc -20.6 | 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
#E2EBF3
oklch(93.6% 0.015 244.7)
-
Step 200
200
#CBDBEB
oklch(88.4% 0.028 248.1)
-
Step 300
300
#A7C4E0
oklch(80.8% 0.051 247.5)
-
Step 400
400
#77A6D1
oklch(70.8% 0.081 246.8)
-
Step 500
500
#528FC5
oklch(63.2% 0.104 247)
-
Step 600
600
#3578B2
oklch(55.7% 0.113 247.6)
-
Step 700
700 (this color)
#256397
oklch(48.6% 0.105 247.5)
-
Step 800
800
#22527C
oklch(42.7% 0.087 247.9)
-
Step 900
900
#214464
oklch(37.6% 0.069 248.2)
-
Step 950
950
#14283A
oklch(26.9% 0.043 247.2)
#256397 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) | #4B6599 | 0.039 |
| Deuteranopia (no green cones) | #3B5B96 | 0.028 |
| Tritanopia (no blue cones) | #006F76 | 0.075 |
| Achromatopsia (no color) | #5F5F5F | 0.105 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #256397
#256397
oklch(48.6% 0.105 247.5)
- #865205
#865205
oklch(48.7% 0.105 67.6)
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 #256397, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Peacock Blue #016795 ΔE 0.018
- Denim #3B638C ΔE 0.025
- Denim Blue #3B5B92 ΔE 0.027
- Light Navy Blue #2E5A88 ΔE 0.032
- Dusky Blue #475F94 ΔE 0.033
- Ocean Blue #03719C ΔE 0.040
- Mid Blue #276AB3 ΔE 0.046
- Dusk Blue #26538D ΔE 0.047
Use #256397 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.