#5C99DB
Closest named color: Cornflower Blue (#6495ED). oklch(67% 0.117 251.7), rgb(92, 153, 219).
Aa
Black text reads best on this color (7.03:1).
About this color
#5C99DB is a medium-light, moderately saturated blue. In OKLCH its lightness is 67%, its chroma 0.117 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.033 away. Black text reads best on it, at 7.03:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.117) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.03:1 |
| White text | 2.98:1 |
Values
| HEX | #5C99DB |
| RGB | rgb(92, 153, 219) |
| HSL | hsl(211, 64%, 61%) |
| OKLCH | oklch(67% 0.117 251.7) |
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 #5C99DB | 2.98:1 | Fails | Lc -61.7 | Content text, not long reading |
| Black text on #5C99DB | 7.03:1 | AAA | Lc 47.7 | Large or bold text, headings |
| #5C99DB text on white | 2.98:1 | Fails | Lc 56.3 | Large or bold text, headings |
| #5C99DB text on black | 7.03:1 | AAA | Lc -45.5 | Large or bold text, headings |
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 400.
-
Step 50
50
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF8
oklch(93.6% 0.021 252.5)
-
Step 200
200
#C6DCF4
oklch(88.6% 0.041 250.6)
-
Step 300
300
#9EC4EF
oklch(80.8% 0.074 251.8)
-
Step 400
400 (this color)
#5C99DB
oklch(67% 0.117 251.7)
-
Step 500
500
#398CE0
oklch(63% 0.15 251.7)
-
Step 600
600
#0574CE
oklch(55.5% 0.163 251.8)
-
Step 700
700
#0061AF
oklch(49% 0.146 251.8)
-
Step 800
800
#025091
oklch(42.8% 0.126 251.7)
-
Step 900
900
#104373
oklch(37.7% 0.097 251.2)
-
Step 950
950
#0C2743
oklch(26.8% 0.062 251.9)
#5C99DB 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) | #7D9CDE | 0.039 |
| Deuteranopia (no green cones) | #6D90DA | 0.028 |
| Tritanopia (no blue cones) | #00A8B0 | 0.099 |
| Achromatopsia (no color) | #959595 | 0.117 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5C99DB
#5C99DB
oklch(67% 0.117 251.7)
- #C28839
#C28839
oklch(67% 0.118 71.5)
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 #5C99DB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.033
- Chefchaouen Blue #4895EF ΔE 0.038
- Dark Sky Blue #448EE4 ΔE 0.043
- Faded Blue #658CBB ΔE 0.052
- Soft Blue #6488EA ΔE 0.055
- Perrywinkle #8F8CE7 ΔE 0.071
- Greyblue #77A1B5 ΔE 0.072
- Dodger Blue #1E90FF ΔE 0.075
Use #5C99DB 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.