#30639E
Closest named color: Denim Blue (#3B5B92). oklch(49.4% 0.11 253.7), rgb(48, 99, 158).
Aa
White text reads best on this color (6.16:1).
About this color
#30639E is a medium-dark, moderately saturated blue. In OKLCH its lightness is 49%, its chroma 0.110 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.027 away. White text reads best on it, at 6.16:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.110) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 3.40:1 |
| White text | 6.16:1 |
Values
| HEX | #30639E |
| RGB | rgb(48, 99, 158) |
| HSL | hsl(212, 53%, 40%) |
| OKLCH | oklch(49.4% 0.11 253.7) |
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 #30639E | 6.16:1 | AA | Lc -85.7 | Fine for body text |
| Black text on #30639E | 3.40:1 | AA large text | Lc 23.5 | Dividers and decoration only |
| #30639E text on white | 6.16:1 | AA | Lc 80.5 | Fine for body text |
| #30639E text on black | 3.40:1 | AA large text | Lc -21.3 | 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
#E3EBF4
oklch(93.7% 0.015 251.2)
-
Step 200
200
#CCDBED
oklch(88.6% 0.03 253)
-
Step 300
300
#A9C3E3
oklch(80.8% 0.054 253.8)
-
Step 400
400
#7BA4D5
oklch(70.8% 0.085 253.3)
-
Step 500
500
#598CCA
oklch(63.1% 0.109 254.1)
-
Step 600
600
#3D75B6
oklch(55.5% 0.118 253.6)
-
Step 700
700 (this color)
#30639E
oklch(49.4% 0.11 253.7)
-
Step 800
800
#28507F
oklch(42.6% 0.091 253.9)
-
Step 900
900
#254366
oklch(37.7% 0.07 253.4)
-
Step 950
950
#16273C
oklch(26.9% 0.046 254.4)
#30639E 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) | #4967A0 | 0.030 |
| Deuteranopia (no green cones) | #395D9D | 0.018 |
| Tritanopia (no blue cones) | #007179 | 0.086 |
| Achromatopsia (no color) | #616161 | 0.110 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #30639E
#30639E
oklch(49.4% 0.11 253.7)
- #845700
#845700
oklch(49.4% 0.105 74.4)
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 #30639E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.027
- Dusky Blue #475F94 ΔE 0.027
- Denim #3B638C ΔE 0.030
- Peacock Blue #016795 ΔE 0.031
- Mid Blue #276AB3 ΔE 0.035
- French Blue #436BAD ΔE 0.038
- Light Navy Blue #2E5A88 ΔE 0.041
- Ocean Blue #03719C ΔE 0.044
Use #30639E 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.